@article{TAC_2007_18_a9,
     author = {Eugenia Cheng and Nick Gurski},
     title = {Towards an n-category of cobordisms},
     journal = {Theory and applications of categories},
     pages = {274--302},
     publisher = {mathdoc},
     volume = {18},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2007_18_a9/}
}