TY  - JOUR
AU  - I. P. Iliev
AU  - Kh. I. Semerdzhiev
TI  - Holonomic mechanical systems with two degrees of freedom that admit quadratic integrals
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1972
SP  - 51
EP  - 53
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1972_2_a6/
LA  - ru
ID  - IVM_1972_2_a6
ER  -