@article{JETPL.96.894, title = {}, author = {Goran, A. V. and Strygin, I. S. and Bykov, A. A.}, journal = {JETP Lett.}, volume = {96}, issue = {12}, pages = {803}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_30128.shtml}, note = {[Pisma v ZhETF 96, 894 (2012)]} }