@article{CRMATH_2019__357_6_520_0,
     author = {Bonnet, Beno{\^\i}t and Gauthier, Jean-Paul and Rossi, Francesco},
     title = {Generic singularities of the {3D-contact} {sub-Riemannian} conjugate locus},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {520--527},
     publisher = {Elsevier},
     volume = {357},
     number = {6},
     year = {2019},
     doi = {10.1016/j.crma.2019.05.008},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2019.05.008/}
}