@article{TAC_2011_25_a8,
     author = {Peter LeFanu Lumsdaine},
     title = {A small observation on co-categories},
     journal = {Theory and applications of categories},
     pages = {247--250},
     publisher = {mathdoc},
     volume = {25},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2011_25_a8/}
}