TY - JOUR AU - I. S. Kukles TI - On Frommer's method in singular point investigations JO - Doklady Akademii Nauk PY - 1957 SP - 367 EP - 370 VL - 117 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1957_117_3_a2/ LA - ru ID - DAN_1957_117_3_a2 ER -