%0 Journal Article
%A N. V. Ivanov
%T Teichm\"uller modular groups and arithmetical groups
%J Zapiski Nauchnykh Seminarov POMI
%D 1988
%P 95-110
%V 167
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1988_167_a5/
%G ru
%F ZNSL_1988_167_a5