TY - JOUR AU - I. I. Endovickii TI - Stability conditions for the solutions of a~linear differential equation of the second order with a~periodic coefficient JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1967 SP - 28 EP - 33 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1967_5_a4/ LA - ru ID - IVM_1967_5_a4 ER -