@article{TAC_2001_8_a20,
     author = {Matias Menni},
     title = {Closure operators in exact completions},
     journal = {Theory and applications of categories},
     pages = {522--540},
     year = {2001},
     volume = {8},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2001_8_a20/}
}