@article{TAC_2007_18_a0,
     author = {Stephen Lack},
     title = {Bicat is not triequivalent to {Gray}},
     journal = {Theory and applications of categories},
     pages = {1--3},
     publisher = {mathdoc},
     volume = {18},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2007_18_a0/}
}