@article{JETPL.97.283, title = {}, author = {Dubinov, A. A.}, journal = {JETP Lett.}, volume = {97}, issue = {5}, pages = {245}, year = {2013}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.7868/S0370274X13050019}, note = {[Pisma v ZhETF 97, 283 (2013)]} }