@article{JETPL.104.264, title = {}, author = {, and Shuravin, N. S. and , and , }, journal = {JETP Lett.}, volume = {104}, issue = {4}, pages = {263}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16160104}, note = {[Pisma v ZhETF 104, 264 (2016)]} }