@article{GDZPPN002226979, title = {On a Functional Equation Arising in Information Theory.}, journal = {Manuscripta mathematica}, volume = {55}, year = {1986}, pages = {439-452}, zbl = {0588.39006}, url = {http://dml.mathdoc.fr/item/GDZPPN002226979} }
Sander, Wolfgang. On a Functional Equation Arising in Information Theory.. Manuscripta mathematica, Tome 55 (1986) pp. 439-452. http://gdmltest.u-ga.fr/item/GDZPPN002226979/