[3] Euclid, Elements. Greek text edited by J. L. Heiberg, English translation by R. Fitzpatrick (2008) https://farside.ph.utexas.edu/books/Euclid/Euclid.html
[4] Hilbert, D. (1899). Foundations of Geometry, Open Court, La Salle, 1971. (Based on the 10th German edition.) Original edition: Grundlagen der Geometrie, B. G. Teubner, Leipzig.