TY - JOUR AU - M. F. Kulagina TI - The Riemann problem in the case of a~countable set of contours in a~class of generalized analytic functions JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1980 SP - 82 EP - 85 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1980_7_a16/ LA - ru ID - IVM_1980_7_a16 ER -