@article{JETPL.110.482, title = {}, author = {, and , and Shumilin, A. V.}, journal = {JETP Lett.}, volume = {110}, issue = {7}, pages = {495}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19190093}, note = {[Pisma v ZhETF 110, 482 (2019)]} }