@article{JETPL.108.466, title = {}, author = {AlFiky, M. T. and Hamed, A. M.}, journal = {JETP Lett.}, volume = {108}, issue = {7}, pages = {435}, year = {2018}, doi = {}, url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X18190025}, note = {[Pisma v ZhETF 108, 466 (2018)]} }