@article{JETPL.105.430, title = {}, author = {Ivanov, V. Yu. and Kuz?menko, A. M. and Mukhin, A. A.}, journal = {JETP Lett.}, volume = {105}, issue = {7}, pages = {435}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17070049}, note = {[Pisma v ZhETF 105, 430 (2017)]} }