@article{01604180, title = {Note on a functional equation related to the power means.}, journal = {Mathematica Pannonica}, volume = {11}, year = {2000}, pages = {199-204}, zbl = {0973.39015}, language = {en}, url = {http://dml.mathdoc.fr/item/01604180} }
Sikorska, Justyna. Note on a functional equation related to the power means.. Mathematica Pannonica, Tome 11 (2000) pp. 199-204. http://gdmltest.u-ga.fr/item/01604180/