1. Carnahan, B., Luther, H., and Wilkes, J.: 1969,Applied and Numerical Methods, John Wiley and Sons.
2. Jackson, J.D.: 1962,Classical Electrodynamics, John Wiley and Sons.
3. Mavraganis, A.,Limiting Cases in the Magnetic-Binary Problem (To be published.)
4. Mavraganis, A. and Pangalos, C.: 1983,Indian J. Pure Appl. Math. 14 (3), 297.
5. Rosenberg, R.: 1980,Analytical Dynamics of Discrete systems, Plenum Press.