%0 Journal Article
%A S. I. Savel'ev
%T Surfaces with plane generatrices along which the tangent plane is constant
%J Doklady Akademii Nauk
%D 1957
%P 663-665
%V 115
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_115_4_a7/
%G ru
%F DAN_1957_115_4_a7