- 1007/s00022-019-0507-x, S2CID 209943756 Pambuccian,
Victor (1994), "Zum
Stufenaufbau des Parallelenaxioms",
Journal of Geometry, 51 (1–2): 79–88, doi:10.1007/BF01226859...
- gutenberg.org.
Retrieved 13 June 2023. Pambuccian,
Victor (1994), "Zum
Stufenaufbau des Parallelenaxioms",
Journal of Geometry, 51 (1–2): 79–88, doi:10.1007/BF01226859...
- doi:10.1007/BF01448980, S2CID 122651688 Pambuccian,
Victor (1994), "Zum
Stufenaufbau des Parallelenaxioms",
Journal of Geometry, 51 (1–2): 79–88, doi:10.1007/BF01226859...