TY - JOUR AU - G. A. Los' TI - Theorems on the instability of solutions of an $n$th order linear homogeneous differential equation with periodic coefficients JO - Differencialʹnye uravneniâ PY - 1968 SP - 625 EP - 630 VL - 4 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1968_4_4_a4/ LA - ru ID - DE_1968_4_4_a4 ER -