@article{TAC_2022_38_a34,
     author = {G.S.H. Cruttwell and M.J. Lambert and D.A. Pronk and M. Szyld},
     title = {Double {Fibrations}},
     journal = {Theory and applications of categories},
     pages = {1326--1394},
     publisher = {mathdoc},
     volume = {38},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2022_38_a34/}
}