@article{JETPL.106.305, title = {}, author = {Filatov, S. V. and , and Levchenko, A. A.}, journal = {JETP Lett.}, volume = {106}, issue = {5}, pages = {330}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1717009X}, note = {[Pisma v ZhETF 106, 305 (2017)]} }