@article{COCV_2017__23_4_1751_0,
     author = {Grochowski, Marek and Kry\'nski, Wojciech},
     title = {On contact {sub-pseudo-Riemannian} isometries},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {1751--1765},
     publisher = {EDP-Sciences},
     volume = {23},
     number = {4},
     year = {2017},
     doi = {10.1051/cocv/2016072},
     mrnumber = {3716939},
     zbl = {1379.53044},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv/2016072/}
}