@article{01930041, title = {Universal connections on Lie groupoids.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2003}, year = {2003}, pages = {1465-1480}, doi = {10.1155/S0161171203111064}, zbl = {1023.58011}, language = {en}, url = {http://dml.mathdoc.fr/item/01930041} }
Vassiliou, Efstathios; Nikolopoulos, Apostolos. Universal connections on Lie groupoids.. International Journal of Mathematics and Mathematical Sciences, Tome 2003 (2003) pp. 1465-1480. doi : 10.1155/S0161171203111064. http://gdmltest.u-ga.fr/item/01930041/