O. Anwar Bég, H. S. Takhar, G. Nath, and A. J. Chamkha, “Mathematical Modelling of Hydromagnetic Convection from a Rotating Sphere with Impulsive Motion and Buoyancy Effects”, NAMC, vol. 11, no. 3, pp. 227–245, Sep. 2006, doi: 10.15388/NA.2006.11.3.14744.