%0 Journal Article
%A R. R. Mukhin
%T Development of the conceptual provisions of the qualitative theory
%J Čebyševskij sbornik
%D 2022
%P 269-290
%V 23
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CHEB_2022_23_5_a21/
%G ru
%F CHEB_2022_23_5_a21