@article{JETPL.108.93, title = {}, author = {Tikhonov, A. M.}, journal = {JETP Lett.}, volume = {108}, issue = {2}, pages = {102}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18140047}, note = {[Pisma v ZhETF 108, 93 (2018)]} }