@article{JETPL.94.662, title = {}, author = {, and , and Levchenko, A. A. and Mezhov-Deglin, L. P. and , }, journal = {JETP Lett.}, volume = {94}, issue = {8}, pages = {621}, year = {2011}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29559.shtml}, note = {[Pisma v ZhETF 94, 662 (2011)]} }