%0 Journal Article
%A W. Wilson Stothers
%T Impossible Specifications for the Modular Group.
%J Manuscripta mathematica
%D 1974
%P 415-428
%V 13
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MM2_1974__13_154277/
%F MM2_1974__13_154277