@article{GDZPPN002028174,
title = {The Equation F(F(x, y), F(z, y)) = F(x, z).},
journal = {Aequationes mathematicae},
volume = {10},
year = {1974},
pages = {196-198},
zbl = {0289.39002},
url = {http://dml.mathdoc.fr/item/GDZPPN002028174}
}
Chinda, K.P. The Equation F(F(x, y), F(z, y)) = F(x, z).. Aequationes mathematicae, Tome 10 (1974) pp. 196-198. http://gdmltest.u-ga.fr/item/GDZPPN002028174/