@article{JETPL.102.139, title = {}, author = {, and , and Vagizov, F. G.}, journal = {JETP Lett.}, volume = {102}, issue = {2}, pages = {125}, year = {2015}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X1514012X}, note = {[Pisma v ZhETF 102, 139 (2015)]} }