@article{TAC_2005_15_a0,
     author = {Steve Awodey and Michael A. Warren},
     title = {Predicative algebraic set theory},
     journal = {Theory and applications of categories},
     pages = {1--39},
     publisher = {mathdoc},
     volume = {15},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2005_15_a0/}
}