O. J. Fenuga, S. J. Aroloye, and S. O. Salawu, “Mathematical Model and Solution for an Unsteady MHD Fourth Grade Fluid Flow over a Vertical Plate in a Porous Medium with Magnetic Field and Suction/Injection Effects”, J. Sci. Res., vol. 12, no. 4, pp. 485–498, Sep. 2020.