@article{JETPL.104.856, title = {}, author = {Shchepetilnikov, A. V. and , and Nefyodov, Yu. A. and Kukushkin, I. V. and , and , and , and , }, journal = {JETP Lett.}, volume = {104}, issue = {12}, pages = {838}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16240048}, note = {[Pisma v ZhETF 104, 856 (2016)]} }