@book{CIF_1969__2_,
     author = {Rodrigues, A. Martins},
     title = {G-structures et pseudo-groupes de {Lie}},
     series = {Cours de l'institut Fourier},
     publisher = {Institut des Math\'ematiques Pures - Universit\'e Scientifique et M\'edicale de Grenoble},
     number = {2},
     year = {1969},
     language = {fr},
     url = {http://www.numdam.org/item/CIF_1969__2_/}
}