@article{JETPL.104.673, title = {}, author = {, and Bornyakov, V. G. and , and , and , and , and , }, journal = {JETP Lett.}, volume = {104}, issue = {10}, pages = {657}, year = {2016}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1622001X}, note = {[Pisma v ZhETF 104, 673 (2016)]} }