@article{JETPL.100.787, title = {}, author = {Rubtsov, G. I. and , }, journal = {JETP Lett.}, volume = {100}, issue = {11}, pages = {689}, year = {2014}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X14230015}, note = {[Pisma v ZhETF 100, 787 (2014)]} }