Proceedings of the Steklov Institute of Mathematics
Proceedings of the Steklov Institute of Mathematics > 2015 > 288 > 1 > 129-141
Proceedings of the Steklov Institute of Mathematics > 2015 > 289 > 1 > 26-41
Proceedings of the Steklov Institute of Mathematics > 2015 > 289 > 1 > 64-76
Proceedings of the Steklov Institute of Mathematics > 2015 > 289 > 1 > 139-145