@article{CMUC_1993__34_1_a2,
     author = {Ml\v{c}ek, Josef},
     title = {Monotonic valuations of $\pi \sigma $-triads and evaluations of ideals},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {23--32},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1993},
     mrnumber = {1240200},
     zbl = {0792.03034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1993__34_1_a2/}
}