Utilizing Peganum harmala plant as a catalyst for producing biodiesel from waste cooking oil: A practical method for recycling used oil into biodiesel. Indian Journal of Chemical Technology (IJCT), [S. l.], v. 32, n. 4, p. 497–503, 2025. DOI: 10.56042/ijct.v32i4.10402. Disponível em: https://or.niscpr.res.in/index.php/IJCT/article/view/10402. Acesso em: 14 may. 2026.