@article{PDM_2018_1_a7,
     author = {A. Y. Nikitin and A. N. Rybalov},
     title = {On complexity of the satisfiability problem of systems over finite posets},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {94--98},
     publisher = {mathdoc},
     number = {1},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2018_1_a7/}
}