TY - JOUR AU - L. V. Trigubovich TI - Certain sufficient criteria for the reducibility of second order linear systems JO - Differencialʹnye uravneniâ PY - 1972 SP - 1323 EP - 1325 VL - 8 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_7_a22/ LA - ru ID - DE_1972_8_7_a22 ER -