@article{01332099, title = {Universal }, journal = {Acta Mathematica Universitatis Comenianae. New Series}, volume = {65}, year = {1996}, pages = {175-188}, zbl = {0928.16011}, language = {en}, url = {http://dml.mathdoc.fr/item/01332099} }
Dubois-Violette, M.; Kerner, R. Universal . Acta Mathematica Universitatis Comenianae. New Series, Tome 65 (1996) pp. 175-188. http://gdmltest.u-ga.fr/item/01332099/