@article{01596911, title = {Flexible cross-polytopes in the Euclidean 4-space.}, journal = {Journal for Geometry and Graphics}, volume = {4}, year = {2000}, pages = {159-167}, zbl = {0977.52028}, language = {en}, url = {http://dml.mathdoc.fr/item/01596911} }
Stachel, Hellmuth. Flexible cross-polytopes in the Euclidean 4-space.. Journal for Geometry and Graphics, Tome 4 (2000) pp. 159-167. http://gdmltest.u-ga.fr/item/01596911/