@article{PDM_2010_2_a1,
     author = {N. G. Parvatov},
     title = {Galois relation for closed classes of discrete functions},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {10--15},
     publisher = {mathdoc},
     number = {2},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2010_2_a1/}
}