فهرس المقالات vahid khatibi bardsiri المقاله 1 - Type-2 Fuzzy Logic Approach To Increase The Accuracy Of Software Development Effort Estimation Zahra Barati Mahdi Jafari Shahbazzadeh Vahid Khatibi Bardsiri Journal of Advances in Computer Engineering and Technology , العدد 5 , السنة 2 , پاییز 2016