@article{GDZPPN00204076X,
title = {Measurable solutions of a (2, 2)-type sum form functional equation.},
journal = {Aequationes mathematicae},
volume = {47},
year = {1994},
pages = {203-222},
zbl = {0803.39009},
url = {http://dml.mathdoc.fr/item/GDZPPN00204076X}
}
Losonczi, László. Measurable solutions of a (2, 2)-type sum form functional equation.. Aequationes mathematicae, Tome 47 (1994) pp. 203-222. http://gdmltest.u-ga.fr/item/GDZPPN00204076X/