@article{JETPL.94.565, title = {}, author = {Zelener, B. B. and Zelener, B. V. and , }, journal = {JETP Lett.}, volume = {94}, issue = {7}, pages = {525}, year = {2011}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29539.shtml}, note = {[Pisma v ZhETF 94, 565 (2011)]} }