1. Relativistic Spinor Linearization of the KEPLER Motion
2. On Spinor Equations of Motion and their “Possible Integrals”
3. : 1982b, Dialog 2–82, p. 48, Danmarks Ingeniorakademi, DK-2800 Lyngby.
4. Schaum's Outl;Spiegel,1968
5. : 1961, Handbuch der Physik, Bd. XLVI/1, p. 88, Springer, Berlin, Göttingen, Heidelberg.