Ratna Sari Dewi, and Sunarsini. “ajian ntegral avalieri-allis an ntegral orter-allis erta aitannya engan ntegral iemann”. Limits: Journal of Mathematics and Its Applications 3, no. 2 (November 15, 2006): 81. ccessed December 6, 2025. https://journal.its.ac.id/index.php/limits/article/view/5360.