@article{JETPL.94.762, title = {}, author = {Arzhnikov, A. K. and Groshev, A. G.}, journal = {JETP Lett.}, volume = {94}, issue = {9}, pages = {703}, year = {2011}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29575.shtml}, note = {[Pisma v ZhETF 94, 762 (2011)]} }