@article{TAC_2001_8_a1,
     author = {Susan Niefield},
     title = {Exponentiable {Morphisms:} {Posets,} {Spaces,} {Locales,} and {Grothendieck} {Toposes}},
     journal = {Theory and applications of categories},
     pages = {16--32},
     publisher = {mathdoc},
     volume = {8},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2001_8_a1/}
}