@article{VMUMM_1982_5_a1,
     author = {S. D. Zakharov},
     title = {The algebra of enumeration operators},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {7--11},
     year = {1982},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1982_5_a1/}
}