@article{GDZPPN002083469,
title = {Die vierte Dimension.},
journal = {Elemente der Mathematik},
volume = {50},
year = {1995},
pages = {107-115},
zbl = {0859.57021},
url = {http://dml.mathdoc.fr/item/GDZPPN002083469}
}
Okonek, Christian. Die vierte Dimension.. Elemente der Mathematik, Tome 50 (1995) pp. 107-115. http://gdmltest.u-ga.fr/item/GDZPPN002083469/