@article{JETPL.104.13, title = {}, author = {Eremin, M. V. and , }, journal = {JETP Lett.}, volume = {104}, issue = {1}, pages = {15}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1613004X}, note = {[Pisma v ZhETF 104, 13 (2016)]} }