@article{JETPL.97.32, title = {}, author = {, and , and Glushkov, V. V. and , }, journal = {JETP Lett.}, volume = {97}, issue = {1}, pages = {28}, year = {2013}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X13010062}, note = {[Pisma v ZhETF 97, 32 (2013)]} }