The Properties of Fuel and Characterization of Functional Groups in Biodiesel -Water Emulsions from Waste Cooking Oil and Its Blends. Indonesian J. Sci. Technol [Internet]. 2024 Jan. 11 [cited 2025 Jul. 9];5(1):95-108. Available from: https://ejournal.kjpupi.id/index.php/ijost/article/view/114