@article{DM_1990_2_1_a5,
     author = {S. L. Bezrukov and V. P. Voronin},
     title = {Extremal ideals of the lattice of multisets for symmetric functionals},
     journal = {Diskretnaya Matematika},
     pages = {50--58},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1990_2_1_a5/}
}