H. . Albala, K. . Maazouz, Z. . Bellabes, N. . Boussekkine, A. Moumen, and H. . Saber, “On the Stability of Partial Integral Equations Governed by Hadamard Fractional Integrals of Piecewise Constant Order”, Contemp. Math., vol. 7, no. 3, pp. 2996–3013, May 2026.