Doklady Mathematics
Doklady Mathematics > 2014 > 90 > 1 > 458-461
Doklady Mathematics > 2014 > 90 > 1 > 495-498
Doklady Mathematics > 2014 > 90 > 1 > 407-411
Doklady Mathematics > 2014 > 90 > 1 > 485-488
Doklady Mathematics > 2014 > 90 > 1 > 458-461
Doklady Mathematics > 2014 > 90 > 1 > 495-498
Doklady Mathematics > 2014 > 90 > 1 > 407-411
Doklady Mathematics > 2014 > 90 > 1 > 485-488