@article{TAC_2008_20_a15,
     author = {Hiroyuki Nakaoka},
     title = {Cohomology theory in 2-categories},
     journal = {Theory and applications of categories},
     pages = {543--604},
     publisher = {mathdoc},
     volume = {20},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2008_20_a15/}
}