@article{JETPL.102.555, title = {}, author = {, and Sukhachev, A. and , and , }, journal = {JETP Lett.}, volume = {102}, issue = {8}, pages = {493}, year = {2015}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15200023}, note = {[Pisma v ZhETF 102, 555 (2015)]} }