A. Emin, M. A. Abdelkawy, and . A. Biswas, “Efficient Spectral Collocation Schemes for Nonlinear <i>ψ</i>-Caputo Fractional Riccati Differential Equations with Variable-Order”, Contemp. Math., vol. 7, no. 3, pp. 3165–3183, May 2026.