TY - JOUR AU - V. A. Yakubovich TI - A~theorem on the stability of a~linear hamiltonian system with periodic coefficients JO - Zapiski Nauchnykh Seminarov POMI PY - 1972 SP - 220 EP - 234 VL - 27 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1972_27_a14/ LA - ru ID - ZNSL_1972_27_a14 ER -