UTILIZATION OF WASTE FOIL AND CARBIDE SLAG AS HETEROGENEOUS CATALYST FOR IN-SITU TRANSESTERIFICATION OF Ricinus Communis (CASTOR SEEDS). FUDMA JOURNAL OF SCIENCES, [S. l.], v. 6, n. 6, p. 303–310, 2023. DOI: 10.33003/fjs-2022-0606-1184. Disponível em: http://162.254.38.185/index.php/fjs/article/view/1184. Acesso em: 17 sep. 2025.