Rasmi, D.F. and Ginting, B. 2019. OPERATOR-OPERATOR PADA HIMPUNAN LEMBUT KABUR HESITANT BERNILAI INTERVAL. Jurnal Matematika UNAND. 8, 1 (Jul. 2019), 40–48. DOI:https://doi.org/10.25077/jmu.8.1.40-48.2019.