%0 Journal Article
%A V. V. Ivlev
%A E. M. Arkhipova
%T On an approximation of Pfaff's equations
%J Matematičeskoe obrazovanie
%D 2018
%P 30-37
%N 4
%U http://geodesic.mathdoc.fr/item/MO_2018_4_a4/
%G ru
%F MO_2018_4_a4