@article{JETPL.98.518, title = {}, author = {, and Sokolov, A. E. and Edelman, I. and , and Chichkov, V. and , }, journal = {JETP Lett.}, volume = {98}, issue = {8}, pages = {460}, year = {2013}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X13200058}, note = {[Pisma v ZhETF 98, 518 (2013)]} }