TY - JOUR AU - M. H. Brenerman TI - The Riemann problem on a~countable set of convex contours that are condensed toward a~continuum JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1980 SP - 67 EP - 69 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1980_12_a11/ LA - ru ID - IVM_1980_12_a11 ER -