@article{JETPL.104.277, title = {}, author = {Zubarev, N. M. and Kochurin, E. A.}, journal = {JETP Lett.}, volume = {104}, issue = {4}, pages = {275}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16160128}, note = {[Pisma v ZhETF 104, 277 (2016)]} }