Komar Roni, Sutopo, Rusydi NM. The Effect of Alkali Treatment Duration on the Tensile Strength and Physical Properties of Polyester Composites Reinforced with Coconut Fiber. JVARS [Internet]. 2025 Dec. 31 [cited 2026 Jan. 17];2(2):104-11. Available from: https://journal.uny.ac.id/publications/jvars/article/view/2522