@article{JETPL.95.104, title = {}, author = {Turlapov, A. V.}, journal = {JETP Lett.}, volume = {95}, issue = {2}, pages = {}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29627.shtml}, note = {[Pisma v ZhETF 95, 104 (2012)]} }