@article{JETPL.110.539, title = {}, author = {, and Shuravin, N. S. and , and , }, journal = {JETP Lett.}, volume = {110}, issue = {8}, pages = {545}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19200050}, note = {[Pisma v ZhETF 110, 539 (2019)]} }