Search results
Mathematical Notes > 2019 > 105 > 5-6 > 641-648
Russian Mathematics > 2019 > 63 > 3 > 78-82
Theoretical and Mathematical Physics > 2018 > 195 > 1 > 557-562
Siberian Mathematical Journal > 2017 > 58 > 2 > 183-189
Mathematical Notes > 2019 > 105 > 5-6 > 641-648
Russian Mathematics > 2019 > 63 > 3 > 78-82
Theoretical and Mathematical Physics > 2018 > 195 > 1 > 557-562
Siberian Mathematical Journal > 2017 > 58 > 2 > 183-189