@article{ASENS_1889_3_6__S3_0,
     author = {Vogt, H.},
     title = {Sur les invariants fondamentaux des \'equations diff\'erentielles lin\'eaires du second ordre},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {3--71},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 6},
     year = {1889},
     doi = {10.24033/asens.331},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.331/}
}