@article{VMUMM_1997_4_a18,
     author = {M. A. Posypkin},
     title = {On closed classes containing precomplete classes of the set of all one-place functions},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {58--59},
     year = {1997},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1997_4_a18/}
}