@article{MASLO_1978_28_1_a3,
     author = {Dvure\v{c}enskij, Anatolij},
     title = {Signed states on a logic},
     journal = {Mathematica slovaca},
     pages = {33--40},
     year = {1978},
     volume = {28},
     number = {1},
     mrnumber = {527772},
     zbl = {0372.02017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1978_28_1_a3/}
}