@article{PDM_2011_13_a7,
     author = {B. A. Pogorelov and M. A. Pudovkina},
     title = {On approximation of permutations by imprimitive groups},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {17--18},
     publisher = {mathdoc},
     number = {13},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2011_13_a7/}
}