@article{10_21136_CMJ_1965_100696,
     author = {Nov\'ak, V{\'\i}t\v{e}zslav},
     title = {On universal quasi-ordered sets},
     journal = {Czechoslovak Mathematical Journal},
     pages = {589--595},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {1965},
     doi = {10.21136/CMJ.1965.100696},
     mrnumber = {0190004},
     zbl = {0135.03003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1965.100696/}
}