1. H. Lamb “Hydrodynamics”. Cambridge § 328 1932 Eq. (8).
2. Hydromagnetic dynamo theory;Elsasser;Rev. Mod. Phys.,1956
3. On the existence of electromagnetic-hydrodynamic waves, Arkiv för Matematik Astronomi och Fysik 29B, No. 2 1943 see also;Alfv;Nature,1942
4. Theory of thin airfoils in fluids of high electrical conductivity;Sears;J. Fluid Mech.,1959
5. Note on airfoil theory in hydromagnetics;Ludford;J. Aero. Sci.,1961