@article{GDZPPN00036357X, title = {Repeated Angles in E4 .}, journal = {Discrete \& computational geometry}, volume = {3}, year = {1988}, pages = {73-76}, zbl = {0629.52014}, url = {http://dml.mathdoc.fr/item/GDZPPN00036357X} }
Purdy, G. Repeated Angles in E4 .. Discrete & computational geometry, Tome 3 (1988) pp. 73-76. http://gdmltest.u-ga.fr/item/GDZPPN00036357X/