@article{AUPO_1974__14_1_a5,
     author = {Rach\r{u}nek, Ji\v{r}{\'\i}},
     title = {$O$-id\'eaux des ensembles ordonn\'es},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {77--81},
     publisher = {mathdoc},
     volume = {14},
     number = {1},
     year = {1974},
     mrnumber = {0382085},
     zbl = {0324.06001},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1974__14_1_a5/}
}