Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1978_5_a6, author = {V. A. Kakichev}, title = {Analysis of the conditions of solvability for {a~Riemann} problem of the second kind}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {54--60}, publisher = {mathdoc}, number = {5}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1978_5_a6/} }
V. A. Kakichev. Analysis of the conditions of solvability for a~Riemann problem of the second kind. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1978), pp. 54-60. http://geodesic.mathdoc.fr/item/IVM_1978_5_a6/