B. Hamid, A.
(2018).
 Developed Upgraded Method for Solving Problems of Factor Groups.
<em>Gezira Journal Of Engineering And Applied Sciences, 9</em>(1).
Retrieved from <a href="http://37.60.236.48/index.php/gjeas/article/view/473" target="_new">http://37.60.236.48/index.php/gjeas/article/view/473</a>