Tomov, D.

English

Varna Medical University Press: Journals

CITATION ANALYSIS OF T H E BULGARIAN AUTHORS AND L I T E R A T U R E IN T H E PROCEEDINGS OF "IMMUNOLOGY OF REPRODUCTION" D. Tomov Key-words: citation analysis — self-citation — Bulgarian publications — symposia "Immu-nology of Reproduction" I t is a noteworthy fact that the interest in the problems of immunology of reproduction increases rapidly nowadays. The citation analysis could be consi­dered as a new information language for the scientists indeed. One of the most important applications of this analysis is in studies of science policy and re­search evaluation (5). I t contributes successfully to remark the significant scienti­fic achievements of the current theory and practice concerning various actual problems. Recently the citations of the Bulgar ian scientists have been studied, too ( 1 , 2, 4) . The role of the international scientific forums (congresses, conferen­ces, symposia e t c ) for the exchange of most actual information arises ceaseless­l y (3 a. oth.). The participants at scientific meetings choose the most relevant and valuable publications in the literature available and then include some of them in their reference lists. That ' s why the citation analysis of congress pro­ceedings could reveal the most frequently cited authors, publications and their pr imary information sources which play a significant role in the development of science. I t delineates the leading directions and tendencies of both national and worldwide importance. The purpose of this work is to present the results from the citation and self-citation analysis of the Bulgarian authors and literature in the proceedings of "Immunology of Reproduction" ( I R ) . Material and methods Our investigation covered the Proceedings of the 1 s t —5 t h International symposia of I R held in Varna in 1967, 1971, 1975, 1978 and 1982. The sciento-metric method after P . L . K - Gross and Е . M . Gross (6) was applied. There were 4 groups of publications: by Bulgarian authors only, foreign authors only and by international collectives wi th or without Bulgar ian participations. The refe­rences of a l l items were analysed according to a l l names of Bulgar ian scientists and titles of the primary information sources of their publications cited. The self-citation analysis was made according to a l l Bulgar ian authors of correspond items in the proceedings only. The Bulgar ian scientists have been either cited by foreign and Bulgar ian authors, or self-cited (directly or indirectly) by them­selves. The citations of the Proceedings of I R were demonstrated separately. Some of the numerous data received are summarized on tables. 7 Citation analysis of the. 137 Results and discussion The number of authors, publications and citations in the symposia is shown on table one. Bulgarian publications are cited in 157 items. According to the intensity of citation the publications of Bulgarian and foreign authors are divided into T a b l e 1 Number of authors, articles and citations in the symposia proceedings Authors (Articles) Citations Symposium number Total l S t 2 n d 3 r d 4 t h 5 t h Bulgarian only articles citations Foreigners only articles citations Bulg. a. foreign articles citations Articles with cited Bulg. publications 81 29 189 95 51 464 19 3 62 20 105 26 327 205 78 982 42 5 55 30 103 27 З1З 330 99 1469 52 10 115 40 165 43 428 355 110 1004 63 • 6 54 42 1 137 43 258 368 127 508 25 5 15 25 168 1515 465 4427 29 301 157 3 groups: items wi th 1 — 10 citations — 286 (56,30 % ) ; items wi th 11—30 cita­tions — 194 (38,19 % ) , and wi th more citations — 28 (5,51 % ) only. 508 of 662 publications (76,74 % ) contain reference lists only. According to the primary information sources of cited publications the journals are most-frequently cited (59 titles wi th 211 citations) followed by the group of congress proceedings (51 titles wi th 151 citations), by the books (20 titles wi th 34 citat ions), and the­ses (12 titles wi th 18 citations, respectively self-citations). The mean citation rate per c i t ing article is shown on table 2. I t differs i n the single symposia and in Bulgar ian and foreign articles. The lowest rate is i n the 5 t h but the highest — in the 2 n d symposium proceedings. I t is higher in ar t i ­cles by foreign authors than in these by Bulgar ian ones: 12,98 to 10,59 citations per item respectively. T a b l e 2 Mean number of citations per article in I R Publications of Symposium number Total l S t 2 n d 3 r d 4 t h 5 t h Bulg. authors Foreign authors Collectives of Bulg. a. foreign authors T o t a l 9,95 14,06 20,67 13,00 13,08 15,59 11,00 14,67 12,04 15,30 12,78 14,44 10,19 10,79 10,80 10,61 8,32 9,07 7,50 8,78 10,59 12,98 12,54 12,29 138 D. Tomov The self-citation analysis has established that self-citations occur in 103 of 167 Bulgar ian publications wi th citations. The total number of self-cited items is 288 (15,86 % ) . The citations of the articles in the Proceedings of I R (1 —5th symposia) in themselves are summarized on table 3. There are 86 self-citations T a b l e 3 Citation of publications from the symposia I R Citing publications Cited publications Bulgarian Foreign u % n Bulgarian Foreign Total cited publications 57 22 79 22,8 8,8 31,6 43 128 171 17,2 51,2 68,4 of al l 250 citations — 34,4 %. The foreign authors have cited 22 Bulgar ian pub-lications in the I R proceedings. Bulgar ian articles and books are cited in 41 (12,02 % ) of 341 items with citations by foreign authors. The number of these citations is 71 — 1,60 % ) of a l l citations in foreign items only. The distribution of journal articles by Bulgar ian authors cited according to year of publication is presented on fig. 1. The interest in publications in dif-ferent years varies in the single symposia. The journals articles published 2—4 years ago are predominantly cited in the year of corresponding symposium. The most cited articles are published in the following years: 1964 — 23 citations; 1962 — 20; 1960 — 17, and 1968 — 16 ones. I n the last 18 years the lowest c i -tation rates for articles are in 1972 — 1 and in 1969 — 3 only, although 3, respecf t ive ly 4 symposia were held in this period. The immediacy factor (number o) articles cited in the same year of symposium to a l l published articles in this year-is quite low and due almost exceptionally to self-citation. Our data received re-veal some aspects of the dynamics of the communications in the field of repro-ductive human and animal immunology. The total number of cited, respectively self-cited Bulgar ian authors is 167. They can be divided into following groups: a) cited by Bulgar ian and foreign authors and self-cited, too — 15 (8.98 per cent); b) cited by Bulgar ian authors — 82 (49,10 per cent) or foreign ones only — 7 (4,20 per cent); c) cited by Bulgar ian and foreign authors both — 5 (2,99 per cent); d) cited by Bulgarian authors and self-cited — 24 (14,37 per cent) and e) self-cited only — 34 (20,36 per cent). 12 authors have been cited more that 20 times and 114 — 1—2 times only. The citation rates for the immunologists, biologists and obstetricians are quite higher than these ones for the histologists and biochemists. Citations of scientists from other scientific fields are rare excep-tions only, which gives evidence for the unenviable state of interdisciplinary communications of Bulgar ian immunologists working on the problems of re-production. I n the spirit of the tradition of citation-appraisal, let us point out the most frequently cited Bulga r i an scientists on the pages of I R : R . Popivanov (total 105 times; 37 — by Bulgar ian authors, 17 — by foreign ones, and 51 — self-citations); K - Bratanov (89; 27, 40 and 22 respectively); V . Vulchanov (84; 26, 11 and 47); V . Dikov (58; 11, 26 and 21); T . Ev rev (45; 16, 6 and 23); S .Zhivkov Citation analysis of the. 139 (41; 13, 6 and 22); L . Nakov (32; 7, 6 and 19); A . Tornjov (32; 7, 4 and 21); J u . Vasileva-Popova (26; 4, 2 and 20) and T . Ananiev (23; 11, 1 and 11). The following 5 Bulgarian journals are most frequently cited: C . R . Acad. B u l g . S c i . — 47 times; Akush. i ginekol. — 28; Veterinarnomed. nauki — 19; I z v . Inst . Phy-/7 ^ citations Fig . 1 s iol . — 11, and I z v . N i l B P R N B — 10 times. The Bulgarian—Russian book "Actual topics of cellular immunology and immunogenetics — Sofia, B A S , 1973" is the most frequently cited one — 8 times (in two symposia only) . Our present results show similar quantitative and quali tative bibliometric characteristics in comparison wi th another international symposium — "Verhan-dlungen der Anatomischen Gesellschaft" (69—73. Versammlung) (7). The ave-rage number of citations per article is 9,56; the selt-citation rate is 17,67 per cent. The citations of the items of these proceedings in themselves are 44,26 per cent for the "Vern. Anat . G e s . " and 52,32 per cent for the I R of a l l proceedings' c i -tations. Our investigation establishes the growth of international authority of the Bulgar ian authors and their publications from year to year. T h i s fact is ap-parent from their increasing citation rates, from the publishing of papers by foreign authors in the profile Bulgar ian journal " B i o l , et Immunol . Reprod" , and from the increasing number of participants from different countries a l l over the world at this symposium. The foreign authors use more frequently their own or other results published in the I R in their investigations. We conclude that the citation analysis of I R reflects par t ia l ly some interest-ing peculiarities of the current exchange of scientific information between the 1 140 Citation analysis of the... immunologists of reproduction from many other countries and Bulgar ia . I t could contribute to more intensive development of the scientific communications and help the fundamental and practical research on this actual field nowadays and in the future. R E F E R E N C E S : 1. И в а н о в а , M. , Д . Т о м о в . Цитиране на български автори и литература в пристатийната библиография на съветски медицински списания. Варна, ВМИ, 1980. 59 с. Депон, ръкопис в Ц И Н Т И — С о ф и я , № Нд 1821/1981 г. — 2. И в а н о в а , М., Д . Т о ­м о в , Ж. Т о д о р о в а . Цитиране болгаров, докторов медицинских наук, в болгарских медицинских журналах и в Science Citation Index. 1982 (под печат). — З. К и с е л е в , А. К., Г. А. К У т и н, В. И. П л а т о н е н к о, В. П. У с а ч е в . Некоторые аспек­ты разработки информационно-поисковой подсистемы «Конгресс». — В: Итоги и перспек­тивы по научной медицинской информации и науковедению. Материалы I I . Всесоюзного съезда историков медицины. Ташкент, 1980, 58—60. — 4. Ш е к е р д ж и й с к а , Й. , Н. М а т е е в . Има ли значение цитирането? — Социол. пробл., 1980, 4, 51—62. — 5. G а г -f i e l d , Е. Citation analysis as a tool in journal evaluation. — Science, 178, 1972, 4060, 471—479. — 6. G r o s s , P . L . K - , Е. M. G r o s s . College libraries and chemical edu­cation. — Science, 66, 1927, 1713, 385—389. — 7, N a n о v, S., D. T о m о v . Uber das Zitieren von Autoren und von Literatur in den Verhandlungen der Anatomischen Gesellschaft. — Verh. Anat. Ges., 76, 1982, 613—614. ЦИТАТА-АНАЛИЗ БОЛГАРСКИХ АВТОРОВ И ЛИТЕРАТУРЫ В ТРУДАХ МЕЖДУНАРОДНОГО СИМПОЗИУМА «ИММУНОЛОГИЯ РЕПРОДУКЦИИ» Д. Томов Р Е З Ю М Е Проведено наукометрическое исследование цитирования и самоцитирования публика­ций болгарских авторов в трудах I — V Международных симпозиумов «Иммунология репро­дукции». Среднее число цитат на одну публикацию составляет 12,29. Самоцитирование бол­гарских авторов составляет 15,86 %. Болгарские публикации цитировались в 157 статьях, из которых 41 статья опубликована за границей. Указывается на наиболее цитированных болгарских авторов и на наиболее части цитированные болгарские журналы. Обсуждается вопрос о значении цитаты-анализа конгрессных материалов для развития международных научных коммуникаций. 

CITATION ANALYSIS OF THE BULGARIAN AUTHORS AND LITERATURE IN THE PROCEEDINGS OF "IMMUNOLOGY OF REPRODUCTION"

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CITATION ANALYSIS OF THE BULGARIAN AUTHORS AND LITERATURE IN THE PROCEEDINGS OF "IMMUNOLOGY OF REPRODUCTION"

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