@article{CRMATH_2006__342_8_589_0,
     author = {Doubrov, Boris and Zelenko, Igor},
     title = {A canonical frame for nonholonomic rank two distributions of maximal class},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {589--594},
     publisher = {Elsevier},
     volume = {342},
     number = {8},
     year = {2006},
     doi = {10.1016/j.crma.2006.02.010},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2006.02.010/}
}