Ajala, E. O.Ajala, M. A.Ayinla, I.K.Sonusi, A.D.Fanodun, S.E.2022-03-092022-03-092020(4) Ajala, E.O., Ajala, M.A., Ayinla, I.K., Sonusi, A.D. and Fanodun, S.E. (2020): Nano‑synthesis of solid acid catalysts from waste‑iron‑filling for biodiesel production using high free fatty acid waste cooking oil. Scientific Reports, 10:13256, Published by Nature Research (www.nature.com). Available online at: https://doi.org/10.1038/s41598-020-70025-xhttps://uilspace.unilorin.edu.ng/handle/20.500.12484/7674enArticle