Musin, Oleg R.
Nikitenko, Anton V.
Funding for this research was provided by:
Russian Government Megagrant (11.G34.31.0026)
Division of Mathematical Sciences (1400876)
Russian Foundation for Basic Research (15-01-99563)
Article History
Received: 10 December 2012
Revised: 24 August 2015
Accepted: 30 September 2015
First Online: 2 November 2015