@article{CMUC_1967_8_4_a1,
     author = {Trnkov\'a, V\v{e}ra},
     title = {Completions of small subcategories},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {581--633},
     year = {1967},
     volume = {8},
     number = {4},
     mrnumber = {0231885},
     zbl = {0266.18002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1967_8_4_a1/}
}