@article{COCV_2012__18_4_1150_0,
     author = {Grochowski, Marek},
     title = {The structure of reachable sets for affine control systems induced by generalized {Martinet} sub-lorentzian metrics},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {1150--1177},
     publisher = {EDP-Sciences},
     volume = {18},
     number = {4},
     year = {2012},
     doi = {10.1051/cocv/2011202},
     mrnumber = {3019476},
     zbl = {1268.53040},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/cocv/2011202/}
}