@article{JETPL.96.145, title = {}, author = {Gorbunov, A. V. and Timofeev, V. B.}, journal = {JETP Lett.}, volume = {96}, issue = {2}, pages = {138}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29848.shtml}, note = {[Pisma v ZhETF 96, 145 (2012)]} }