@article{01596906, title = {Five spheres in mutual contact.}, journal = {Journal for Geometry and Graphics}, volume = {4}, year = {2000}, pages = {109-114}, zbl = {0974.51020}, language = {en}, url = {http://dml.mathdoc.fr/item/01596906} }
Coxeter, H.S.M. Five spheres in mutual contact.. Journal for Geometry and Graphics, Tome 4 (2000) pp. 109-114. http://gdmltest.u-ga.fr/item/01596906/