@article{JETPL.96.879, title = {}, author = {, and , and , and Danilov, I. V. and Brazhkin, V. V.}, journal = {JETP Lett.}, volume = {96}, issue = {12}, pages = {789}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_30126.shtml}, note = {[Pisma v ZhETF 96, 879 (2012)]} }