@article{TAC_2012_26_a24,
     author = {Olivia Caramello},
     title = {Site characterizations for geometric invariants of toposes},
     journal = {Theory and applications of categories},
     pages = {710--728},
     publisher = {mathdoc},
     volume = {26},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2012_26_a24/}
}