Moumen, A., Albala, H. , Zentar, O. , Ziane, M. and Mahrouz, T. 2026. Cauchy Problem Involving Hybrid Proportional–Caputo Derivative in Banach Spaces. Contemporary Mathematics . 7, 3 (May 2026), 3014–3031. DOI:https://doi.org/10.37256/cm.7320269181.