Kurniawan Atmadja, and Miftahul Fikri. “elabelan armonis ada raf angga egi iga aku”. Limits: Journal of Mathematics and Its Applications 20, no. 2 (July 15, 2023): 157–163. ccessed December 14, 2025. https://journal.its.ac.id/index.php/limits/article/view/5514.