@article{JETPL.95.414, title = {}, author = {, and , and Titov, A. N. and , }, journal = {JETP Lett.}, volume = {95}, issue = {7}, pages = {372}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29676.shtml}, note = {[Pisma v ZhETF 95, 414 (2012)]} }