@article{10_4064_ba52_4_1,
     author = {Y. B. Jun and Yang Xu},
     title = {Roughness of {Filters} in {Lattice} {Implication} {Algebras}},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {341--352},
     publisher = {mathdoc},
     volume = {52},
     number = {4},
     year = {2004},
     doi = {10.4064/ba52-4-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba52-4-1/}
}