@article{MASLO_1984__34_3_a11,
     author = {Navara, Mirko},
     title = {Two-valued states on a concrete logic and the additivity problem},
     journal = {Mathematica slovaca},
     pages = {329--336},
     publisher = {mathdoc},
     volume = {34},
     number = {3},
     year = {1984},
     mrnumber = {756991},
     zbl = {0597.28004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1984__34_3_a11/}
}