@article{MZ_1959__72_183618,
     author = {Frederick Bagemihl},
     title = {Planar sections of spatial sets.},
     journal = {Mathematische Zeitschrift},
     pages = {362--366},
     publisher = {mathdoc},
     volume = {72},
     year = {1959},
     zbl = {0091.05401},
     url = {http://geodesic.mathdoc.fr/item/MZ_1959__72_183618/}
}