@article{SEMR_2016_13_a58,
     author = {V. I. Rodionov},
     title = {On enumeration of posets defined on finite set},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {318--330},
     publisher = {mathdoc},
     volume = {13},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2016_13_a58/}
}