1. Heinicke, C., Hehl, F.W.: Computer algebra in gravity. In: Grabmeier, J., Kaltofen, E., Weispfennig V. (eds.) Computer Algebra Handbook. Springer, Berlin (2003).
arXiv: gr-qc/0105094
2. Korolkova, A.V., Kulyabov, D.S., Sevastyanov, L.A.: Tensor computations in computer algebra systems. Program. Comput. Softw. 39(3), 135–142, (2013).
arXiv:1402.6635
[cs.SC]
3. MacCallum, M.A.H.: Computer algebra in gravity research. Living Rev. Relat. 21, (1), 6 (2018)
4. Cohen, I., Frick, I., Åman, J.E.: Algebraic computing in general relativity. Fundam. Theor. Phys. 9, 139 (1984)
5. Birkandan, T.: A Newman–Penrose calculator for instanton metrics. Int. J. Mod. Phys. C 19, 1277 (2008).
arXiv:0711.0613
[gr-qc]