@article{MAN_1904__59_158169,
     author = {N. Sonin},
     title = {Sur les fonctions cylindriques. {(Extrait} d'un {Lettre} adress\'ee \`a {M.} {Niels} {Nielsen,} \`a {Copenhague)}},
     journal = {Mathematische Annalen},
     pages = {529--552},
     publisher = {mathdoc},
     volume = {59},
     year = {1904},
     zbl = {35.0480.03},
     url = {http://geodesic.mathdoc.fr/item/MAN_1904__59_158169/}
}