Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1969_8_a4, author = {S. N. Kudryashov}, title = {The number of solutions of exterior inverse boundary value problems}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {30--32}, publisher = {mathdoc}, number = {8}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_8_a4/} }
S. N. Kudryashov. The number of solutions of exterior inverse boundary value problems. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1969), pp. 30-32. http://geodesic.mathdoc.fr/item/IVM_1969_8_a4/