@article{ARM_1965_1_2_a0,
     author = {Sekanina, Milan},
     title = {On the power of ordered sets},
     journal = {Archivum mathematicum},
     pages = {75--82},
     year = {1965},
     volume = {1},
     number = {2},
     mrnumber = {0207600},
     zbl = {0148.25601},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1965_1_2_a0/}
}