@article{PIM_1980_N_S_28_42_a3,
     author = {Milan Bo\v{z}i\'c},
     title = {Truth {Filters} in de {Morgan} {Lattices}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {25 },
     publisher = {mathdoc},
     volume = {_N_S_28},
     number = {42},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1980_N_S_28_42_a3/}
}