@article{MZM_1971_10_3_a14,
     author = {B. I. Selivanov},
     title = {Generalization of the problem of the number of partitions of a finite set},
     journal = {Matemati\v{c}eskie zametki},
     pages = {361--367},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_10_3_a14/}
}