Kefas, Haruna Mavakumba, et al. “Utilization of Doum Shell Catalyst in Biodiesel Production from Palmitic Acid: Development of Statistical Optimization Approach”. Knowledge-Based Engineering and Sciences, vol. 5, no. 3, Dec. 2024, pp. 83-101, doi:10.51526/kbes.2024.5.3.83-101.