“Pengaruh Kosentari Natrium Hidroksida Terhadap Ketangguhan Komposit Polyester Berpenguat Serat Serabut Kelapa: Effect of Sodium Hydroxide Cosentration on The Toughness of Polyester Composites Reinforced with Coconut Fiber” (2026) Journal of Technology, Innovation and Reseach in Engineering, 1(1), pp. 34–38. Available at: https://journal.grahawidya.org/index.php/tire/article/view/19 (Accessed: 9 August 2026).