Mahanani, Dwi, and Dewi Ismiarti. “SOME FUNDAMENTAL PROPERTIES OF HEAPS”. BAREKENG: Jurnal Ilmu Matematika dan Terapan 17, no. 4 (December 18, 2023): 1927-1932. Accessed July 23, 2024. https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/9048.