Proceedings of the Steklov Institute of Mathematics
Proceedings of the Steklov Institute of Mathematics > 2015 > 289 > 1 > 240-268
Proceedings of the Steklov Institute of Mathematics > 2015 > 289 > 1 > 42-53
Proceedings of the Steklov Institute of Mathematics > 2015 > 289 > 1 > 209-215