@article{TAC_2011_25_a20,
     author = {J.R.B. Cockett and G.S.H. Cruttwell and J. D. Gallagher},
     title = {Differential restriction categories},
     journal = {Theory and applications of categories},
     pages = {537--613},
     publisher = {mathdoc},
     volume = {25},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2011_25_a20/}
}