@article{BSMA_1870__1__R7_0,
     author = {Darboux, G.},
     title = {Avertissement},
     journal = {Bulletin des Sciences Math\'ematiques et Astronomiques},
     pages = {vii--viii},
     publisher = {Gauthier-Villars},
     volume = {1},
     year = {1870},
     language = {fr},
     url = {http://www.numdam.org/item/BSMA_1870__1__R7_0/}
}