SYARIF , M. R. .; NAIF. Konsolidasi Metodologis Kalender Islam Internasional: Meneladani Intelektual Umar Bin Khattab dan Julius Caesar. Jurnal Bimas Islam, [S. l.], v. 10, n. 3, p. 517–538, 2017. DOI: 10.37302/jbi.v10i3.33. Disponível em: https://jurnalbimasislam.kemenag.go.id/jbi/article/view/33. Acesso em: 4 may. 2024.