@article{JETPL.104.325, title = {}, author = {, and , and , and , and , and , and Tagirov, M. S.}, journal = {JETP Lett.}, volume = {104}, issue = {5}, pages = {315}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X16170069}, note = {[Pisma v ZhETF 104, 325 (2016)]} }