%0 Journal Article
%T Yurii Leonidovich Ershov (on his 80th birthday)
%J Algebra i logika
%D 2020
%P I-V
%V 59
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_2020_59_3_a0/
%G ru
%F AL_2020_59_3_a0