@article{DM_1997_9_2_a11,
     author = {V. L. Mikheev},
     title = {On regressive enumerations},
     journal = {Diskretnaya Matematika},
     pages = {116--119},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1997_9_2_a11/}
}