@article{ASENS_1898_3_15__179_0,
     author = {Guichard, C.},
     title = {Sur les syst\`emes orthogonaux et les syst\`emes cycliques (suite)},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {179--227},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 15},
     year = {1898},
     doi = {10.24033/asens.455},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/asens.455/}
}