@article{02216481,
title = {Coincidences of simplex centers and related facial structures.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {46},
year = {2005},
pages = {491-512},
zbl = {1093.51014},
language = {en},
url = {http://dml.mathdoc.fr/item/02216481}
}
Edmonds, Allan L.; Hajja, Mowaffaq; Martini, Horst. Coincidences of simplex centers and related facial structures.. Beiträge zur Algebra und Geometrie, Tome 46 (2005) pp. 491-512. http://gdmltest.u-ga.fr/item/02216481/