@article{DM_1994_6_4_a4,
     author = {V. B. Alekseev and L. L. Voronenko},
     title = {On some closed classes in partial two-valued logic},
     journal = {Diskretnaya Matematika},
     pages = {58--79},
     year = {1994},
     volume = {6},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1994_6_4_a4/}
}