@article{CMUC_1962__3_2_a1,
     author = {Hedrl{\'\i}n, Zden\v{e}k},
     title = {Two theorems concerning common fixed point of commutative mappings},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {32--36},
     publisher = {mathdoc},
     volume = {03},
     number = {2},
     year = {1962},
     mrnumber = {0159896},
     zbl = {0111.01301},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1962__3_2_a1/}
}