The University of Sofia, Bulgaria, disseminates local biomedical literature (1994 to present) through a free online database, ABS. We systematically searched ABS to identify citations to controlled trials and find what proportion of these studies are to be found on MEDLINE.\ud We searched using Bulgarian and English phrases; manually selected citations of controlled trials and sought these citations on MEDLINE. Using the two languages we found a total of 628 unique citations, of which 47 of which seem to be relevant controlled trials (precision 7.48%, 13% of ABS citations were found on MEDLINE). The trials in ABS commonly focused on evaluation of care for people with cardiovascular or urological problems. \ud \ud \u
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