%0 Journal Article
%A J.S. Ponizovskiï
%T Evgeniï Sergejevich Lyapin on his 80th birthday.
%J Semigroup forum
%D 1994
%P 271-274
%V 49
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1994__49_2_135353/
%F SF_1994__49_2_135353