@article{JETPL.109.746, title = {}, author = {, and Podlivaev, A. I.}, journal = {JETP Lett.}, volume = {109}, issue = {11}, pages = {710}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19110055}, note = {[Pisma v ZhETF 109, 746 (2019)]} }