@article{ASENS_1883_2_12__301_0,
     author = {Guichard, C.},
     title = {Th\'eorie des points singuliers essentiels},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {301--394},
     publisher = {Elsevier},
     volume = {2e s{\'e}rie, 12},
     year = {1883},
     doi = {10.24033/asens.227},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/asens.227/}
}