Yusuf, M., M. Halilu, and K. B. Filli. “Influence of Extrusion Process Conditions on the Residence Time and Throughput of a Twin-Screw Extruder Using Full Factorial Experimental Design”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 17, no. 4, Dec. 2021, pp. 517-26, https://azojete.com.ng/index.php/azojete/article/view/517.