TY - JOUR AU - V. P. Prokop'ev AU - S. N. Shimanov TI - On stability in the critical case of a double zero root for systems with an aftereffect JO - Differencialʹnye uravneniâ PY - 1966 SP - 453 EP - 462 VL - 2 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1966_2_4_a1/ LA - ru ID - DE_1966_2_4_a1 ER -