@article{ELMA_1949__4_140496,
     author = {J.-P. Sydler},
     title = {Quelques consid\'erations sur les sph\`eres.},
     journal = {Elemente der Mathematik},
     pages = {1--3},
     publisher = {mathdoc},
     volume = {4},
     year = {1949},
     zbl = {0031.40802},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1949__4_140496/}
}