1. Schouten, J.A., Tensor Analysis for Physicists. Oxford: Clarendon Press 1951.
2. Musgrave, M.J.P., Proc. Roy. Soc. 226A, 339 (1954).
3. Synge, J.L., Proc. Roy. Irish Acad. 58A, 13 (1956).
4. Hayes, M.A., & R.S. Rivlin (pending publication).
5. Varley, E., & E. Cumberbatch, J. Inst. Math. Applies 1, 101 (1965).