The Properties of Fuel and Characterization of Functional Groups in Biodiesel -Water Emulsions from Waste Cooking Oil and Its Blends. Indones. j. sci. technol. [Internet]. 2020 Apr. 1 [cited 2026 Jun. 7];5(1):95-108. Available from: https://ijost.upi.edu/index.php/ijost/article/view/231