J. Yahaya, A. Celestine, R. Muhammed, A. Alfa, J. Omonile, and J. Attah, “Magnetohydrodynamic (MHD) Unsteady Axial Flow in an Annulus: A semi-analytical Approach”, GPH-IJAS, vol. 9, no. 1, pp. 112-130, Jul. 2026.