%0 Journal Article
%A I. P. Iliev
%A Kh. I. Semerdzhiev
%T Holonomic mechanical systems with two degrees of freedom that admit quadratic integrals
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1972
%P 51-53
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1972_2_a6/
%G ru
%F IVM_1972_2_a6