@article{JETPL.95.499, title = {}, author = {Glushkov, A. V. and , }, journal = {JETP Lett.}, volume = {95}, issue = {9}, pages = {439}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29691.shtml}, note = {[Pisma v ZhETF 95, 499 (2012)]} }