@article{JETPL.94.146, title = {}, author = {, and Lukoyanov, A. V. and Kurmaev, E. Z. and , and , }, journal = {JETP Lett.}, volume = {94}, issue = {2}, pages = {142}, year = {2011}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29448.shtml}, note = {[Pisma v ZhETF 94, 146 (2011)]} }