1. Misner, C.W., Thorne, K.S., Wheeler, J.A.: Gravitation. Freeman, W. H., San Francisco (1973)
2. Szabados, L.B.: Quasi-local energy–momentum and angular momentum on general relativity. Liv. Rev. Rel. Web. http://relativity.livingreviews.org/Articles/lrr-2009-4/
3. Nester, J.M., Tung, R.S.: A quadratic spinor Lagrangian for general relativity. Gen. Relativ. Gravit. 27, 115–119 (1995)
4. Tung, R.S., Nester, J.M.: The quadratic spinor Lagrangian is equivalent to the teleparallel theory. Phys. Rev. D 60, 021501 (1999)
5. Chang, C.C., Nester, J.M., Chen, C.M.: Energy–momentum (quasi-)localization for gravitating systems. In: Liu, L., Luo, J., Li, X.Z., Hsu, J.P. (eds.) Gravitation and Astrophysics, pp. 163–173. World Scientific, Singapore (2000)