Saifurrohman, Ahmad, and Ashif Azzafi. 2020. “ANALISIS USHUL FIKIH MENGENAI KALENDAR ISLAM DALAM KONTEKSTUALISASI NASH-NASH HISAB DAN RUKYAT”. Ahkam: Jurnal Hukum Islam 8 (2), 373-96. https://doi.org/10.21274/ahkam.2020.8.2.373-396.