@article{JETPL.94.28, title = {}, author = {Basharov, A. M.}, journal = {JETP Lett.}, volume = {94}, issue = {1}, pages = {27}, year = {2011}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29425.shtml}, note = {[Pisma v ZhETF 94, 28 (2011)]} }