@article{JETPL.108.97, title = {}, author = {, and Luo, M. and , and , and , }, journal = {JETP Lett.}, volume = {108}, issue = {2}, pages = {106}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18140059}, note = {[Pisma v ZhETF 108, 97 (2018)]} }