Zakari, M. M.; Musa, A.; Ahmad, F.; Isma`il, U. I.; Iya, S. G. D.; Uzair, M.; Shitu, I. G. Efficacy of Fly Ash As Additive on the Physical Properties of Biodiesel Extracted from Neem Oil. njap 2026, 2 (2), 213-221. https://doi.org/10.62292/njap-v2i2-2026-90.