@article{JETPL.109.371, title = {}, author = {Volodin, V. A. and , and , and , and , and , }, journal = {JETP Lett.}, volume = {109}, issue = {6}, pages = {368}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19060055}, note = {[Pisma v ZhETF 109, 371 (2019)]} }