Hefni, Wildani, et al. “Bureaucratizing Ḥisāb-Ru’ya: Polycentric Islamic Legal Authority in Determining Ramaḍān in Indonesia”. Al-Ahkam, vol. 36, no. 2, Oct. 2026, pp. 367-98, doi:10.21580/ahkam.2026.36.2.31729.