géométrie non euclidienne

[1962] Nikolai Ivanovich Lobachevskii: The Man behind the First Non-Euclidean Geometry ; Alexander Vucinich ; ISIS 53 (1962) p. 465 [lien]
[2012] Zöllner’s Universe ; Helge Kragh ; Physics in Perspective 14 (2012) p. 392 [lien]