%0 Journal Article
%A Polický, Zdeněk
%T Diophantine equation $\frac{q^n-1}{q-1}=y$ for four prime divisors of $y-1$
%J Commentationes Mathematicae Universitatis Carolinae
%D 2005
%P 577-588
%V 46
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_2005__46_3_a17/
%G en
%F CMUC_2005__46_3_a17