@article{GDZPPN002409631, title = {On Supernormal Ehresmann-Dedecker Universes.}, journal = {Mathematische Zeitschrift}, volume = {121}, year = {1971}, pages = {342-350}, zbl = {0215.32603}, url = {http://dml.mathdoc.fr/item/GDZPPN002409631} }
Brignole, D.; Costa, N.C.A. Da. On Supernormal Ehresmann-Dedecker Universes.. Mathematische Zeitschrift, Tome 121 (1971) pp. 342-350. http://gdmltest.u-ga.fr/item/GDZPPN002409631/