@article{TAC_2014_29_a23,
     author = {Alexandru E. Stanculescu},
     title = {Stacks and sheaves of categories as fibrant objects, {I}},
     journal = {Theory and applications of categories},
     pages = {654--695},
     year = {2014},
     volume = {29},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2014_29_a23/}
}