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@article{IVM_1976_8_a4, author = {M. F. Kulagina}, title = {Characteristic singular equations in the case of a~countable set of contours}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {32--41}, publisher = {mathdoc}, number = {8}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1976_8_a4/} }
M. F. Kulagina. Characteristic singular equations in the case of a~countable set of contours. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1976), pp. 32-41. http://geodesic.mathdoc.fr/item/IVM_1976_8_a4/