@article{AM2_1976__14_136565,
     author = {J. R\"atz},
     title = {On the homogeneity of additive mappings.},
     journal = {Aequationes mathematicae},
     pages = {67--72},
     publisher = {mathdoc},
     volume = {14},
     year = {1976},
     zbl = {0329.39002},
     url = {http://geodesic.mathdoc.fr/item/AM2_1976__14_136565/}
}