@article{JETPL.105.275, title = {}, author = {Otrokov, M. M. and Menshchikova, T. V. and Rusinov, I. P. and , and Kuznetsov, V. M. and Chulkov, E. V.}, journal = {JETP Lett.}, volume = {105}, issue = {5}, pages = {297}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17050058}, note = {[Pisma v ZhETF 105, 275 (2017)]} }