%0 Journal Article
%A Sahin, R.
%A Bizim, O.
%A Cangul, I. N.
%T Commutator subgroups of the extended Hecke groups $\bar{H}(\lambda_q)$
%J Czechoslovak Mathematical Journal
%D 2004
%P 253-259
%V 54
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMJ_2004__54_1_a22/
%G en
%F CMJ_2004__54_1_a22