“KETERSEDIAAN OPERASI JOIN DIPERLUAS KOTERI-K TAK-TERDOMINASI”. Jurnal Axiomath : Jurnal Matematika Dan Aplikasinya 2, no. 2 (October 31, 2020): 10–15. Accessed October 3, 2025. http://ejournals.umma.ac.id/index.php/axiomath/article/view/689.