@article{TSG_2015-2016__33__1_0,
     author = {Franceschi, Valentina and Prandi, Dario and Rizzi, Luca},
     title = {Recent results on the essential self-adjointness of {sub-Laplacians,} with some remarks on the presence of characteristic points},
     journal = {S\'eminaire de th\'eorie spectrale et g\'eom\'etrie},
     pages = {1--15},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {33},
     year = {2015-2016},
     doi = {10.5802/tsg.311},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/tsg.311/}
}