@article{TAC_2021_36_a4,
     author = {Ieke Moerdijk},
     title = {Closed dendroidal sets and unital operads},
     journal = {Theory and applications of categories},
     pages = {118--170},
     year = {2021},
     volume = {36},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2021_36_a4/}
}