@article{02125654,
title = {On von Neumann varieties.},
journal = {Theory and Applications of Categories [electronic only]},
volume = {12},
year = {2004},
pages = {5-26},
zbl = {1057.18004},
language = {en},
url = {http://dml.mathdoc.fr/item/02125654}
}
Borceux, F.; Rosický, J. On von Neumann varieties.. Theory and Applications of Categories [electronic only], Tome 12 (2004) pp. 5-26. http://gdmltest.u-ga.fr/item/02125654/