Journal of the Egyptian Mathematical Society
Journal of the Egyptian Mathematical Society > 2012 > 20 > 3 > 179-182
Journal of the Egyptian Mathematical Society > 2013 > 21 > 3 > 184-189
Journal of the Egyptian Mathematical Society > 2015 > 23 > 2 > 242-246
Journal of the Egyptian Mathematical Society > 2016 > 24 > 2 > 220-225
Journal of the Egyptian Mathematical Society > 2017 > 25 > 3 > 286-290