Impossibility of a certain cyclotomic equation with applications to difference sets

Impossibility of a certain cyclotomic equation with applications to difference sets / K. T. Arasu ; A. Pott. - In: Designs and finite geometries / ed. by Dieter Jungnickel. - Boston u.a. : Kluwer Acad. Publ., 1996. - S. 23-27. - (Designs, codes and cryptography ; 8,1/2