@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/}
}