@article{CMUC_1961__2_4_a6,
     author = {Hedrl{\'\i}n, Zden\v{e}k},
     title = {On common fixed points of commutative mappings},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {25--28},
     publisher = {mathdoc},
     volume = {02},
     number = {4},
     year = {1961},
     zbl = {0101.15604},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1961__2_4_a6/}
}