@article{TAC_2003_11_a15,
     author = {Eugenia Cheng},
     title = {The category of opetopes and the category of opetopic sets},
     journal = {Theory and applications of categories},
     pages = {353--374},
     publisher = {mathdoc},
     volume = {11},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2003_11_a15/}
}