@article{TAC_2014_29_a26,
     author = {Seerp Roald Koudenburg},
     title = {On pointwise {Kan} extensions in double categories},
     journal = {Theory and applications of categories},
     pages = {781--818},
     year = {2014},
     volume = {29},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2014_29_a26/}
}