@article{03788628,
title = {Equivalence classes of functions on finite sets.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {5},
year = {1982},
pages = {745-762},
doi = {10.1155/S0161171282000696},
zbl = {0501.05006},
language = {en},
url = {http://dml.mathdoc.fr/item/03788628}
}
Chao, Chong-Yun; Deisher, Caroline I. Equivalence classes of functions on finite sets.. International Journal of Mathematics and Mathematical Sciences, Tome 5 (1982) pp. 745-762. doi : 10.1155/S0161171282000696. http://gdmltest.u-ga.fr/item/03788628/