Search results for: A. Popov
Journal of Mathematical Sciences > 2019 > 239 > 6 > 840-854
Journal of Mathematical Sciences > 2016 > 217 > 5 > 624-627
Journal of Mathematical Sciences > 2013 > 190 > 1 > 135-146
Journal of Mathematical Sciences > 2010 > 171 > 1 > 130-148