@article{DM_1996_8_1_a7,
     author = {Nguyen Van Hoa},
     title = {On closed classes of $k$-valued logic that are self-dual with respect to transitive groups},
     journal = {Diskretnaya Matematika},
     pages = {129--156},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1996_8_1_a7/}
}