@article{GDZPPN002096242,
title = {Universal Connections.},
journal = {Inventiones mathematicae},
volume = {56},
year = {1980},
pages = {59-66},
zbl = {0431.53028},
url = {http://dml.mathdoc.fr/item/GDZPPN002096242}
}
Schlafly, Roger. Universal Connections.. Inventiones mathematicae, Tome 56 (1980) pp. 59-66. http://gdmltest.u-ga.fr/item/GDZPPN002096242/