@article{JETPL.107.525, title = {}, author = {Rozenbaum, V. M. and Shapochkina, I. V. and , and Trakhtenberg, L. I.}, journal = {JETP Lett.}, volume = {107}, issue = {8}, pages = {506}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X18080118}, note = {[Pisma v ZhETF 107, 525 (2018)]} }