@article{PDM_2018_1_a3,
     author = {N. A. Gaydamakin},
     title = {Multilevel thematic-hierarchical access control {(MLTHS-system)}},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {42--57},
     publisher = {mathdoc},
     number = {1},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2018_1_a3/}
}