@article{GDZPPN002061619,
title = {The Hurwitz Matrix Equations and Multifour Groups.},
journal = {Commentarii mathematici Helvetici},
volume = {50},
year = {1975},
pages = {45-58},
zbl = {0305.15006},
url = {http://dml.mathdoc.fr/item/GDZPPN002061619}
}
Young, Samuel S.H. The Hurwitz Matrix Equations and Multifour Groups.. Commentarii mathematici Helvetici, Tome 50 (1975) pp. 45-58. http://gdmltest.u-ga.fr/item/GDZPPN002061619/