@article{ASENS_1890_3_7__233_0,
     author = {Guichard, C.},
     title = {Recherches sur les surfaces \`a courbure totale constante et sur certaines surfaces qui s'y rattachent},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {233--264},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 7},
     year = {1890},
     doi = {10.24033/asens.341},
     mrnumber = {1508843},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.341/}
}