Orugba HO, Oghenejoboh KM, Oghenejoboh UM, Ohimor OE. Production of Biodiesel from a Novel Combination of Raphia Africana Kernel Oil and Turtle Shell (Centrochelys Sulcata) Heterogenous Catalyst. J. Hum. Earth Future [Internet]. 2021 Sep. 1 [cited 2025 Jun. 3];2(3):258-6. Available from: https://www.hefjournal.org/index.php/HEF/article/view/83