@article{CMUC_1971_12_2_a10,
     author = {Trnkov\'a, V\v{e}ra},
     title = {On descriptive classification of set-functors. {II}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {345--357},
     year = {1971},
     volume = {12},
     number = {2},
     mrnumber = {0294446},
     zbl = {0232.18005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1971_12_2_a10/}
}