@article{ASENS_1892_3_9__145_0,
     author = {Raffy, Louis},
     title = {Sur la d\'eformation des surfaces spirales},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {145--166},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 9},
     year = {1892},
     doi = {10.24033/asens.369},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/asens.369/}
}