TY - JOUR AU - V. B. Pilyugina TI - Investigation of a system with a triple zero characteristic root JO - Differencialʹnye uravneniâ PY - 1980 SP - 1520 EP - 1522 VL - 16 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1980_16_8_a20/ LA - ru ID - DE_1980_16_8_a20 ER -