@article{JETPL.103.27, title = {}, author = {, and , and , and , and , and Artemov, V. V. and , }, journal = {JETP Lett.}, volume = {103}, issue = {1}, pages = {25}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16010057}, note = {[Pisma v ZhETF 103, 27 (2016)]} }