@article{JETPL.105.581, title = {}, author = {Trubilko, A. I.}, journal = {JETP Lett.}, volume = {105}, issue = {9}, pages = {617}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17090132}, note = {[Pisma v ZhETF 105, 581 (2017)]} }