@article{JETPL.103.762, title = {}, author = {Potylitsyn, A. P.}, journal = {JETP Lett.}, volume = {103}, issue = {11}, pages = {669}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16110023}, note = {[Pisma v ZhETF 103, 762 (2016)]} }