@article{JETPL.108.618, title = {}, author = {Lebedev, V. S. and , and , }, journal = {JETP Lett.}, volume = {108}, issue = {9}, pages = {582}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18210038}, note = {[Pisma v ZhETF 108, 618 (2018)]} }