@article{MS2_1969__24_166079,
     author = {Asmus L. Schmidt},
     title = {Farey {Simplices} in the {Space} of {Quaternions.}},
     journal = {Mathematica Scandinavica},
     pages = {31--65},
     publisher = {mathdoc},
     volume = {24},
     year = {1969},
     zbl = {0186.09302},
     url = {http://geodesic.mathdoc.fr/item/MS2_1969__24_166079/}
}