@article{MAN_1900__53_157974,
     author = {H.W. Richmond},
     title = {The figure formed from six points in space of four dimensions},
     journal = {Mathematische Annalen},
     pages = {161--176},
     publisher = {mathdoc},
     volume = {53},
     year = {1900},
     zbl = {31.0547.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1900__53_157974/}
}