https://abukhadeejah.com/abul-hasan-al-asharis-shift-away-from-ibn-kullab-third-stage-of-life-and-authenticity-of-ibanah/
The Creed of Abul-Hasan Al-Ashʿari: Al-Ibānah ʿan Usūl Ad-Diyānah: [2] Abul-Hasan Al-Ashʿarī’s Shift Away from Ibn Kullāb in the Third Stage of His Life and the Authenticity of his Work, Al-Ibānah.