TY - JOUR AU - V. A. Kakichev TI - Analysis of the conditions of solvability for a~Riemann problem of the second kind JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1978 SP - 54 EP - 60 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1978_5_a6/ LA - ru ID - IVM_1978_5_a6 ER -