Ardan S, Putra A, DJ L, Sundari R, Etika SB, Nizar UK. THE STUDY OF REUSED SILICA-TITANIA CATALYST ON BIODIESEL PRODUCTION IN VARIOUS REACTION TIMES. IJASRE [Internet]. 2019 Aug. 22 [cited 2024 May 4];5(8):133-41. Available from: https://ijasre.net/index.php/ijasre/article/view/388