@article{CMJ_2000_50_2_a15,
     author = {Hala\v{s}, Radom{\'\i}r},
     title = {Relative polars in ordered sets},
     journal = {Czechoslovak Mathematical Journal},
     pages = {415--429},
     year = {2000},
     volume = {50},
     number = {2},
     mrnumber = {1761398},
     zbl = {1047.06001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2000_50_2_a15/}
}