@article{JETPL.96.588, title = {}, author = {Andreev, I. V. and Muravev, V. M. and Kukushkin, I. V.}, journal = {JETP Lett.}, volume = {96}, issue = {8}, pages = {536}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_30008.shtml}, note = {[Pisma v ZhETF 96, 588 (2012)]} }