@article{CMUC_1976__17_3_a12,
     author = {Pt\'ak, Pavel},
     title = {A note on normal topological functors and extensions of transformations},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {567--574},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {1976},
     mrnumber = {0418036},
     zbl = {0352.18008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1976__17_3_a12/}
}