%0 Journal Article
%A V. M. Finkel'shtein
%T Certain classes of four-parameter direction fields connected with a~non-holonomic surface orthogonal to an arbitrary congruence
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1967
%P 109-116
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1967_6_a13/
%G ru
%F IVM_1967_6_a13