Volume 23, No 1, 2016, P.
UDC
K
Abstract:
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Keywords:
DOI: 10.17377/daio.2016.23.
Y 1,2
A 2
1. Sobolev Institute of Mathematics,
4 Koptyug Ave., 630090 Novosibirsk, Russia
2. Novosibirsk State University,
2 Pirogov St., 630090 Novosibirsk, Russia
e-mail:
Received
Revised
References
[1]
