@article{COCV_2016__22_2_439_0,
     author = {Barilari, D. and Rizzi, L.},
     title = {Comparison theorems for conjugate points in {sub-Riemannian} geometry},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {439--472},
     publisher = {EDP-Sciences},
     volume = {22},
     number = {2},
     year = {2016},
     doi = {10.1051/cocv/2015013},
     mrnumber = {3491778},
     zbl = {1344.53023},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/cocv/2015013/}
}