@article{JETPL.108.522, title = {}, author = {, and , and , and Bozh?ev, I. V. and , and , and , }, journal = {JETP Lett.}, volume = {108}, issue = {7}, pages = {492}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X1819013X}, note = {[Pisma v ZhETF 108, 522 (2018)]} }