@article{JETPL.105.170, title = {}, author = {Kovalenko, S. L. and Pavlova, T. V. and Andryushechkin, B. V. and , and Eltsov, K. N.}, journal = {JETP Lett.}, volume = {105}, issue = {3}, pages = {}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17030080}, note = {[Pisma v ZhETF 105, 170 (2017)]} }