@article{TAC_2001_9_a4,
     author = {Maurizio G. Citterio},
     title = {Classifying spaces of categories and term rewriting},
     journal = {Theory and applications of categories},
     pages = {92--105},
     publisher = {mathdoc},
     volume = {9},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2001_9_a4/}
}