Tong, D., General Relativity, http://www.damtp.cam.ac.uk/user/tong/gr.html
Bahr, B., Skriptum, General Relativity, https://www.physik.uni-hamburg.de/th2/lehre/dokumente/notes/art-skript-1920.pdf
more will be listed in due course
G. Moortgat-Pick
Last modified: 1-Feb-2024