@article{TAC_2014_29_a3,
     author = {Ryan Cohen Reich},
     title = {Obvious natural morphisms of sheaves are unique},
     journal = {Theory and applications of categories},
     pages = {48--99},
     publisher = {mathdoc},
     volume = {29},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2014_29_a3/}
}