@article{PDM_2010_2_a2,
     author = {V. M. Fomichev},
     title = {The properties of $h$-periodic sequences},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {16--21},
     publisher = {mathdoc},
     number = {2},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2010_2_a2/}
}