@article{JETPL.109.25, title = {}, author = {Vedeneev, S. I.}, journal = {JETP Lett.}, volume = {109}, issue = {1}, pages = {24}, year = {2019}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19010053}, note = {[Pisma v ZhETF 109, 25 (2019)]} }