@article{AIF_2013__63_5_1739_0,
     author = {Boscain, Ugo and Laurent, Camille},
     title = {The {Laplace-Beltrami} operator {in~almost-Riemannian} {Geometry}},
     journal = {Annales de l'Institut Fourier},
     pages = {1739--1770},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {63},
     number = {5},
     year = {2013},
     doi = {10.5802/aif.2813},
     zbl = {06284531},
     mrnumber = {3186507},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.2813/}
}