@article{JETPL.104.871, title = {}, author = {Vedeneev, S. I.}, journal = {JETP Lett.}, volume = {104}, issue = {12}, pages = {864}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16240097}, note = {[Pisma v ZhETF 104, 871 (2016)]} }