Lobachevskii Journal of Mathematics
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 759-766
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 747-754
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 755-758
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 777-782
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 803-808
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 783-793
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 771-776
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 794-802
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 835-840
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 818-825
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 742-746
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 767-770
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 841-846
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 826-834
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 855-865
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 847-854
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 731-741
Lobachevskii Journal of Mathematics > 2018 > 39 > 6 > 809-817