@article{GDZPPN001248065,
title = {Cayley functions.},
journal = {Semigroup forum},
volume = {2},
year = {1971},
pages = {349-358},
zbl = {0244.20069},
url = {http://dml.mathdoc.fr/item/GDZPPN001248065}
}
Zupnik, D. Cayley functions.. Semigroup forum, Tome 2 (1971) pp. 349-358. http://gdmltest.u-ga.fr/item/GDZPPN001248065/