@article{AM2_1987__32_137172,
     author = {Pl. Kannappan and B.R. Ebanks and C.T. Ng},
     title = {Generalized fundamental equation of information of multiplicative type.},
     journal = {Aequationes mathematicae},
     pages = {19--31},
     publisher = {mathdoc},
     volume = {32},
     year = {1987},
     zbl = {0612.39006},
     url = {http://geodesic.mathdoc.fr/item/AM2_1987__32_137172/}
}