TY - JOUR AU - I. K. Lifanov TI - The Poincar\'e--Bertrand formula and singular integral equations with multiple Cauchy type integrals JO - Doklady Akademii Nauk PY - 1978 SP - 22 EP - 25 VL - 243 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1978_243_1_a3/ LA - ru ID - DAN_1978_243_1_a3 ER -