@article{COCV_2019__25__A18_0,
     author = {Ottazzi, Alessandro and Vittone, Davide},
     title = {On the codimension of the abnormal set in step two {Carnot} groups},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     publisher = {EDP-Sciences},
     volume = {25},
     year = {2019},
     doi = {10.1051/cocv/2018002},
     zbl = {1444.53024},
     mrnumber = {3981990},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv/2018002/}
}