References
Joachim Pfarr
(1984). Protophysics of time and the principle of relativity. In R. S. Cohen, & M. W. Wartofsky (Eds.). Physical sciences and history of physics (pp. 159-189). Dordrecht: Springer.
(1978). Bernulf Kanitscheider: Vom absoluten Raum zur dynamischen Geometrie. Grazer Philosophische Studien, 6, 179-191. https://doi.org/10.5840/gps1978613.