@article{AFST_1906_2_8__289_0,
     author = {\'E. Goursat},
     title = {Sur les familles de surfaces \`a trajectoires orthogonales planes},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {289--293},
     publisher = {\'Ed. Privat, Imprimeur-Libraire},
     address = {Toulouse},
     volume = {2e s{\'e}rie, 8},
     year = {1906},
     language = {fr},
     url = {https://afst.centre-mersenne.org/item/AFST_1906_2_8__289_0/}
}