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 > 1 > 11-15
Journal of the Egyptian Mathematical Society > 2013 > 21 > 3 > 194-196
Journal of the Egyptian Mathematical Society > 2014 > 22 > 2 > 190-196
Journal of the Egyptian Mathematical Society > 2014 > 22 > 2 > 197-200
Journal of the Egyptian Mathematical Society > 2017 > 25 > 3 > 286-290