@article{10_21136_CMJ_1991_102443,
     author = {Jakub{\'\i}k, J\'an},
     title = {Selfduality of the system of intervals of a partially ordered set},
     journal = {Czechoslovak Mathematical Journal},
     pages = {135--140},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {1991},
     doi = {10.21136/CMJ.1991.102443},
     mrnumber = {1087633},
     zbl = {0790.06001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102443/}
}