Slobodan Babic and Cevdet Akyel 2018. New Formulas for the Mutual Inductance and the Magnetic Force of the System: Thin Disk Coil (Pancake) with Inverse Radial Current Density and Thin Wall Solenoid with Constant Azimuthal Current Density. Global Journals of Research in Engineering. 18, F4 (Jul. 2018), 11–16.