. marhaini, Sri Yusmartini E, Fernianti D, Okka Widhanny L. Transesterification of biodiesel from kapok seed oil (ceiba pentandra) using a natural heterogeneous katalyst (rice husk activation). IJAC [Internet]. 2023 Oct. 30 [cited 2025 May 15];11(2):15-9. Available from: https://mail.sciencepubco.com/index.php/IJAC/article/view/32353