@article{JETPL.96.189, title = {}, author = {Lebed, A. G. and Sepper, O.}, journal = {JETP Lett.}, volume = {96}, issue = {3}, pages = {176}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29872.shtml}, note = {[Pisma v ZhETF 96, 189 (2012)]} }