@article{JETPL.107.564, title = {}, author = {Andrianov, A. V. and , and Petrov, A. G.}, journal = {JETP Lett.}, volume = {107}, issue = {9}, pages = {540}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X18090047}, note = {[Pisma v ZhETF 107, 564 (2018)]} }