@article{AM2_1985__28_137055,
     author = {C.T. Ng},
     title = {On a functional equation related to income inequality measures.},
     journal = {Aequationes mathematicae},
     pages = {161--169},
     publisher = {mathdoc},
     volume = {28},
     year = {1985},
     zbl = {0566.39012},
     url = {http://geodesic.mathdoc.fr/item/AM2_1985__28_137055/}
}