@article{ASENS_1897_3_14__467_0,
     author = {Guichard, C.},
     title = {Sur les syst\`emes orthogonaux et les syst\`emes cycliques},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {467--516},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 14},
     year = {1897},
     doi = {10.24033/asens.453},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.453/}
}