Syarif MR, Naif. Konsolidasi Metodologis Kalender Islam Internasional: Meneladani Intelektual Umar Bin Khattab dan Julius Caesar. j. bimas islam [Internet]. 2017Sep.30 [cited 2024Nov.21];10(3):517-38. Available from: https://jurnalbimasislam.kemenag.go.id/jbi/article/view/33