@article{JETPL.96.632, title = {}, author = {Galoyan, A. S. and , }, journal = {JETP Lett.}, volume = {96}, issue = {9}, pages = {564}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_30013.shtml}, note = {[Pisma v ZhETF 96, 632 (2012)]} }