فهرس المقالات Yisa Yakubu المقاله 1 - On D-efficiency of Reduced Models for Central Composite Experimental Designs within a Split-plot Structure 20.1001.1.22286225.2021.11.3.4.5 10.30495/ijm2c.2021.684818 Yisa Yakubu Angela Chukwu Sule Ahmed International Journal of Mathematical Modeling & Computations , العدد 4 , السنة 11 , تابستان 2021