%0 Journal Article
%A G. N. Makeev
%T On the question of the involutivity of systems of Pfaffian equations
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1980
%P 39-44
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1980_1_a6/
%G ru
%F IVM_1980_1_a6