Authors: A . F. QasrawiH. K. KhanfarR. N. KmailJournal Name: Optik - International Journal for Light and Electron OpticsVolume: 127Issue: 13Pages From: 5193To: 5195Date: الجمعة, يوليو 1, 2016External Link: http://dx.doi.org/10.1016/j.ijleo.2016.03.021