@article{ASENS_1896_3_13__401_0,
     author = {Guichard, C.},
     title = {Sur les surfaces minima non euclidiennes},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 13},
     year = {1896},
     pages = {401-414},
     doi = {10.24033/asens.432},
     language = {fr},
     url = {http://www.numdam.org/item/ASENS_1896_3_13__401_0}
}

Guichard. Sur les surfaces minima non euclidiennes. Annales scientifiques de l'École Normale Supérieure, Serie 3, Volume 13 (1896) , pp. 401-414. doi : 10.24033/asens.432. http://www.numdam.org/item/ASENS_1896_3_13__401_0/