@article{JETPL.94.138, title = {}, author = {, and Palnichenko, A. V. and , }, journal = {JETP Lett.}, volume = {94}, issue = {2}, pages = {134}, year = {2011}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29446.shtml}, note = {[Pisma v ZhETF 94, 138 (2011)]} }