Author: Cenkl, Bohumil
- : Homographies conservant l'élément du troisième ordre d'une surface dans un espace à connexion projective. (French) [Homographies preserving the third order element of a surface in a space with a projective connection]. Czechoslovak Mathematical Journal, vol. 12 (1962), issue 2, pp. 288-293
- : La normale d'une surface dans l'espace à connexion projective. (French) [The normal to a surface in the space with a projective connection]. Czechoslovak Mathematical Journal, vol. 12 (1962), issue 4, pp. 582-606
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