Jean, Frédéric, et al. “On Weyl’s Type Theorems and Genericity of Projective Rigidity in Sub-Riemannian Geometry.”10.1007/s10711-020-00581-z__Geometriae Dedicata, vol. 213, no. 1, Springer Science and Business Media LLC, 2020, pp. 295–314, doi:10.1007/s10711-020-00581-z.

Jean, Frédéric, et al. “On Projective and Affine Equivalence of Sub-Riemannian Metrics.”10.1007/s10711-019-00437-1__Geometriae Dedicata, 2019, pp. 279–319, doi:10.1007/s10711-019-00437-1.