@article{TAC_1997_3_a5,
     author = {G. Janelidze and G. M. Kelly},
     title = {The reflectiveness of covering morphisms in algebra and geometry},
     journal = {Theory and applications of categories},
     pages = {132--159},
     publisher = {mathdoc},
     volume = {3},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_1997_3_a5/}
}