@article{JETPL.93.341, title = {}, author = {Rosanov, N. N. and , and , }, journal = {JETP Lett.}, volume = {93}, issue = {6}, pages = {308}, year = {2011}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29180.shtml}, note = {[Pisma v ZhETF 93, 341 (2011)]} }