@article{CMH_1941__14_138778,
     author = {Alexandre Ostrowski},
     title = {Sur une classe de transformations diff\'erentielles dans l'espace \`a trois dimensions. {II.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {23--60},
     publisher = {mathdoc},
     volume = {14},
     year = {1941},
     zbl = {0025.32903},
     url = {http://geodesic.mathdoc.fr/item/CMH_1941__14_138778/}
}