@article{GDZPPN002068249, title = {Locally toroidal regular polytopes of rank 4.}, journal = {Commentarii mathematici Helvetici}, volume = {67}, year = {1992}, pages = {77-118}, zbl = {0784.52016}, url = {http://dml.mathdoc.fr/item/GDZPPN002068249} }
McMullen, Peter; Schulte, Egon. Locally toroidal regular polytopes of rank 4.. Commentarii mathematici Helvetici, Tome 67 (1992) pp. 77-118. http://gdmltest.u-ga.fr/item/GDZPPN002068249/