Erna Apriliani. “etode similasi ata ebagai stimasi enyelesaian asalah-asalah ingkungan”. Limits: Journal of Mathematics and Its Applications 1, no. 1 (May 15, 2004): 14–18. ccessed December 6, 2025. https://journal.its.ac.id/index.php/limits/article/view/5227.