Rusli Siri, Rahmi, Misbahuddin, Anwar Enre, Andi Faisal Syam, and Muh. Azri Hamka. “Perceived Transaction Costs of Hijri Calendar Fragmentation: Qualitative Evidence from Indonesian Business Actors and Consumers”. Journal of Economics, Entrepreneurship, Management Business and Accounting, vol. 4, no. 5, Sept. 2026, pp. 2356-75, doi:10.61255/jeemba.v4i5.1699.