@article{JETPL.106.417, title = {}, author = {Demura, A. V. and Leont?ev, D. S. and Lisitsa, V. S. and , }, journal = {JETP Lett.}, volume = {106}, issue = {7}, pages = {429}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17190031}, note = {[Pisma v ZhETF 106, 417 (2017)]} }