1. [1] Abdel-Baky, R.A., Al-Bokhary, A.J., A new approach for describing instantaneous line congruence, Archivum Mathematicum, (2008), pp.
223-236.
2. [2] Ball, R.S., A Treatise on the Theory of Screws, Cambridge University Press, 1900 (reprinted 1999).
3. [3] Blaschke, W., Vorlesungen über differential geometrie I, Springer-Verlag, 1945, Berlin.
4. [4] Bottema, O., Roth, B., Theoretical Kinematics, Dover Publications, 1990.
5. [5] Clifford, W.K., Preliminary sketch of bi-quaternions, Proceedings of the Royal Society of London, (1873), pp. 381-395.