Mahrani D, Purba EAF. A COMPARATIVE STUDY OF IBNR CLAIM RESERVE ESTIMATION USING BENKTANDER, WALTER NEUHAUS, AND OPTIMAL CREDIBILITY LOSS RATIO APPROACHES. BAREKENG: J. Math. & App. [Internet]. 8Apr.2026 [cited 9Apr.2026];20(3):1893-910. Available from: https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/20557