Ichou, M. Ait, et al. “A Generalized Fractional Model for Glucose-Insulin With Beta Cells Involving the Hattaf Mixed Fractional Derivative”. Discontinuity, Nonlinearity, and Complexity, vol. 15, no. 4, Aug. 2026, pp. 609-22, https://doi.org/10.5890/DNC.2026.12.010.