1. Carroll, S.M.: Spacetime and Geometry: An Introduction to General Relativity. Cambridge University Press (2019). https://doi.org/10.1017/9781108292607
2. Tabak, J.: Geometry: The Language of Space and Form. Infobase Publishing (2014)
3. Heiberg, J.L., Fitzpatrick, R.: Euclid’s Elements of Geometry: Edited, and Provided with a Modern English Translation, by Richard Fitzpatrick. Independently Published (2008)
4. Braver, S.P.: Lobachevski Illuminated: Content, Methods, and Context of the “Theory of Parallels”. University of Montana (2007)
5. Tino, G.M., Cacciapuoti, L., Capozziello, S., Lambiase, G., Sorrentino, F.: Precision gravity tests and the Einstein equivalence principle. Prog. Part. Nucl. Phys. 112, 103772 (2020). https://doi.org/10.1016/j.ppnp.2020.103772