@article{JETPL.103.804, title = {}, author = {, and Magarill, L. I.}, journal = {JETP Lett.}, volume = {103}, issue = {11}, pages = {711}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16110102}, note = {[Pisma v ZhETF 103, 804 (2016)]} }