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@article{IVM_2010_10_a3, author = {V. S. Mokeichev}, title = {Explicit form of characteristic numbers of a~periodic problem}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {44--50}, publisher = {mathdoc}, number = {10}, year = {2010}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_2010_10_a3/} }
V. S. Mokeichev. Explicit form of characteristic numbers of a~periodic problem. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (2010), pp. 44-50. http://geodesic.mathdoc.fr/item/IVM_2010_10_a3/
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[2] Mokeichev V. S., “Yavnyi vid i kratnost kharakteristicheskikh chisel periodicheskikh zadach dlya differentsialnykh uravnenii”, Differents. uravneniya, 44:3 (2008), 455–466 | MR