@article{JETPL.109.200, title = {}, author = {Timofeev, V. E. and Sorokin, A. O. and , }, journal = {JETP Lett.}, volume = {109}, issue = {3}, pages = {207}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19030135}, note = {[Pisma v ZhETF 109, 200 (2019)]} }