E. Zulfikar, “Pemahaman Hadis Yusuf al-Qardhāwy: Telaah atas Kaidah al-Tamyīz Bayna al-Wasīlah al-Mutaghayyirah wa al-Hadhf al-Thābit”, islamikainside, vol. 5, no. 2, pp. 143-173, Feb. 2021.