@article{JETPL.108.379, title = {}, author = {Popel, S. I. and Golub?, A. P. and , and , and , and , and , and , and , and , and , and , }, journal = {JETP Lett.}, volume = {108}, issue = {6}, pages = {356}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18180030}, note = {[Pisma v ZhETF 108, 379 (2018)]} }