@article{JETPL.105.70, title = {}, author = {Kuznetsov, E. A. and , }, journal = {JETP Lett.}, volume = {105}, issue = {2}, pages = {}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17020047}, note = {[Pisma v ZhETF 105, 70 (2017)]} }