@article{JETPL.95.131, title = {}, author = {Makarov, D. N. and Matveev, V. I.}, journal = {JETP Lett.}, volume = {95}, issue = {3}, pages = {}, year = {2012}, doi = {}, url = {http://jetpletters.ru/ps/0/article_29630.shtml}, note = {[Pisma v ZhETF 95, 131 (2012)]} }