@article{JEP_2018__5__1_0,
     author = {Beauchard, Karine and Pravda-Starov, Karel},
     title = {Null-controllability of hypoelliptic quadratic differential equations},
     journal = {Journal de l{\textquoteright}\'Ecole polytechnique {\textemdash} Math\'ematiques},
     pages = {1--43},
     publisher = {Ecole polytechnique},
     volume = {5},
     year = {2018},
     doi = {10.5802/jep.62},
     mrnumber = {3732691},
     zbl = {06988572},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/jep.62/}
}