TY - JOUR AU - Kh. G. Tsvang TI - Singular points of a differential equation with lagging argument JO - Uchenye Zapiski Moskovskogo Gosudarstvennogo Universiteta PY - 1959 SP - 211 EP - 218 VL - 186 IS - 186 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/UZMU_1959_186_186_a13/ LA - ru ID - UZMU_1959_186_186_a13 ER -