@article{JETPL.107.794, title = {}, author = {, and Saletsky, A. M. and , }, journal = {JETP Lett.}, volume = {107}, issue = {12}, pages = {766}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X18120068}, note = {[Pisma v ZhETF 107, 794 (2018)]} }