@article{PIM_1975_N_S_18_32_a12,
     author = {{\DJ}uro Kurepa},
     title = {Fixpoints {Of} {Decreasing} {Mappings} {Of} {Ordered} {Sets}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {111 },
     publisher = {mathdoc},
     volume = {_N_S_18},
     number = {32},
     year = {1975},
     url = {http://geodesic.mathdoc.fr/item/PIM_1975_N_S_18_32_a12/}
}