@article{MASLO_1990__40_4_a4,
     author = {Czyzowicz, Jurek and Pelc, Andrzej and Rival, Ivan},
     title = {Planar ordered sets of width two},
     journal = {Mathematica slovaca},
     pages = {375--388},
     publisher = {mathdoc},
     volume = {40},
     number = {4},
     year = {1990},
     mrnumber = {1120968},
     zbl = {0753.06001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1990__40_4_a4/}
}