@article{AM2_1981__22_136859,
     author = {Gy. Maksa},
     title = {The general solution of a functional equation related to the mixed theory of information.},
     journal = {Aequationes mathematicae},
     pages = {90--96},
     publisher = {mathdoc},
     volume = {22},
     year = {1981},
     zbl = {0462.39003},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136859/}
}