Siberian Mathematical Journal
Siberian Mathematical Journal > 2018 > 59 > 1 > 22-30
Siberian Mathematical Journal > 2018 > 59 > 3 > 463-469
Siberian Mathematical Journal > 2018 > 59 > 1 > 22-30
Siberian Mathematical Journal > 2018 > 59 > 3 > 463-469