Marzouk, O. A. . “Detailed Derivation of the Scalar Explicit Expressions Governing the Electric Field, Current Density, and Volumetric Power Density in the Four Types of Linear Divergent MHD Channels Under a Unidirectional Applied Magnetic Field”. Contemporary Mathematics, vol. 6, no. 4, July 2025, pp. 4060-0, doi:10.37256/cm.6420256918.