@article{JETPL.104.708, title = {}, author = {, and Gryaznov, V. K. and Philippov, A. V.}, journal = {JETP Lett.}, volume = {104}, issue = {10}, pages = {696}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16220082}, note = {[Pisma v ZhETF 104, 708 (2016)]} }