@article{GDZPPN002029227,
title = {The functional equation f(xy) = ff(x) xy ff(y) in a partially ordered monoid.},
journal = {Aequationes mathematicae},
volume = {14},
year = {1976},
pages = {33-36},
zbl = {0322.39022},
url = {http://dml.mathdoc.fr/item/GDZPPN002029227}
}
Papp, F.J. The functional equation f(xy) = ff(x) xy ff(y) in a partially ordered monoid.. Aequationes mathematicae, Tome 14 (1976) pp. 33-36. http://gdmltest.u-ga.fr/item/GDZPPN002029227/