MathSciNet bibliographic data MR1378516 53C22 (53C20) Agrachev, Andrei; El Alaoui, El-Houcine Chakir; Gauthier, Jean-Paul; Kupka, Ivan Generic singularities of sub-Riemannian metrics on ${\bf R}^3$${\bf R}^3$. C. R. Acad. Sci. Paris Sér. I Math. 322 (1996), no. 4, 377–384. Links to the journal or article are not yet available

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