@article{JETPL.105.554, title = {}, author = {, and , and Zegrya, G. G.}, journal = {JETP Lett.}, volume = {105}, issue = {9}, pages = {586}, year = {2017}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X17090077}, note = {[Pisma v ZhETF 105, 554 (2017)]} }