@article{CMUC_1961_2_4_a4,
     author = {Hedrl{\'\i}n, Zden\v{e}k},
     title = {On iteration methods and the formulation of the {Isbell's} problem},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {20--21},
     year = {1961},
     volume = {2},
     number = {4},
     zbl = {0101.15603},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1961_2_4_a4/}
}