%0 Journal Article
%A M. E. Tsypkin
%T An expression for the measures of curvature and torsion for an unusual ruled surface
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1964
%P 144-152
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1964_1_a19/
%G ru
%F IVM_1964_1_a19