Nwigbo, Oluebube E., et al. “Optimizing Agricultural Drying Technologies: A Systematic Review of Charcoal, Gas, and Hybrid Kilns for Sustainable Food Preservation”. Journal of Sustainable Engineering & Renewable Energy, vol. 1, no. 1, June 2025, pp. 37-51, https://doi.org/10.54536/jsere.v1i1.5038.