Heterogeneous catalyst synthesis from Ribbon vittata shells and its characterization for biodiesel production from Blighia sapida seed oilMoses Tunde Onifade, Oyetola Ogunkunle, Nkosinathi Madushele, Noor A. Ahmed and Opeyeolu Timothy LaseindeE3S Web Conf., 430 (2023) 01231DOI: https://doi.org/10.1051/e3sconf/202343001231