@article{JETPL.107.198, title = {}, author = {Andreeva, M. A. and , and , and , and , and Popov, V. V. and , and Chumakov, A. I. and , }, journal = {JETP Lett.}, volume = {107}, issue = {3}, pages = {196}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X18030116}, note = {[Pisma v ZhETF 107, 198 (2018)]} }