@article{JETPL.107.151, title = {}, author = {Basharov, A. M.}, journal = {JETP Lett.}, volume = {107}, issue = {3}, pages = {143}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X18030025}, note = {[Pisma v ZhETF 107, 151 (2018)]} }