@article{JETPL.102.517, title = {}, author = {, and Muravev, V. M. and Andreev, I. V. and , and Kukushkin, I. V.}, journal = {JETP Lett.}, volume = {102}, issue = {7}, pages = {461}, year = {2015}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X15190121}, note = {[Pisma v ZhETF 102, 517 (2015)]} }