Proceedings of the Steklov Institute of Mathematics
Proceedings of the Steklov Institute of Mathematics > 2015 > 288 > 1 > 79-87
Proceedings of the Steklov Institute of Mathematics > 2015 > 288 > 1 > 54-69
Proceedings of the Steklov Institute of Mathematics > 2015 > 291 > 1 > 96-112