@article{GDZPPN002549840, title = {On an equation of information theory.}, journal = {Aequationes mathematicae}, volume = {20}, year = {1980}, pages = {18-22}, zbl = {0433.39010}, url = {http://dml.mathdoc.fr/item/GDZPPN002549840} }
Swiatak, Halina. On an equation of information theory.. Aequationes mathematicae, Tome 20 (1980) pp. 18-22. http://gdmltest.u-ga.fr/item/GDZPPN002549840/