@article{TAC_2004_12_a1,
     author = {J.F. Jardine},
     title = {Simplicial approximation},
     journal = {Theory and applications of categories},
     pages = {34--72},
     year = {2004},
     volume = {12},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2004_12_a1/}
}