@article{JETPL.105.768, title = {}, author = {Rakhmanov, A. L. and Kugel, K. I. and Kagan, M. Yu. and Rozhkov, A. V. and Sboychakov, A. O.}, journal = {JETP Lett.}, volume = {105}, issue = {12}, pages = {806}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17120128}, note = {[Pisma v ZhETF 105, 768 (2017)]} }