@article{JETPL.107.333, title = {}, author = {Chernozatonskii, L. A. and Demin, V. A.}, journal = {JETP Lett.}, volume = {107}, issue = {5}, pages = {315}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X18050107}, note = {[Pisma v ZhETF 107, 333 (2018)]} }