@article{JETPL.105.158, title = {}, author = {, and , and , and Artemov, V. V. and , }, journal = {JETP Lett.}, volume = {105}, issue = {3}, pages = {}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17030067}, note = {[Pisma v ZhETF 105, 158 (2017)]} }