@article{ZR_1976_1_9_a4,
     author = {Z. Dar\'oczy},
     title = {Remarks on the {Entropy} {Equation}},
     journal = {Zbornik radova},
     pages = {31 },
     year = {1976},
     volume = {1},
     number = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZR_1976_1_9_a4/}
}