@article{AM2_1981__22_136876,
     author = {Konrad J. Heuvers},
     title = {Functional equations which caracterize n-forms and homogeneous functions of degree n.},
     journal = {Aequationes mathematicae},
     pages = {223--248},
     publisher = {mathdoc},
     volume = {22},
     year = {1981},
     zbl = {0508.39015},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136876/}
}