@article{JETPL.108.348, title = {}, author = {, and , and Ivchenko, E. L. and , and , and , and , }, journal = {JETP Lett.}, volume = {108}, issue = {5}, pages = {326}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18170083}, note = {[Pisma v ZhETF 108, 348 (2018)]} }