@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/