@article{DM_1997_9_2_a2,
     author = {A. A. Krokhin and K. L. Safin and E. V. Sukhanov},
     title = {The structure of the lattice of closed classes of polynomials},
     journal = {Diskretnaya Matematika},
     pages = {24--39},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1997_9_2_a2/}
}