Mohammad Imam Utoyo, Er Ayu Nurafifah, and Miswanto. 2018. “nalisis odel atematika rde raksional enyebaran orm erbasis i-i ada martphone”. imits: ournal of athematics and ts pplications 15 (2):97-112. https://journal.its.ac.id/index.php/limits/article/view/5385.