@article{AM2_1973__9_136342,
     author = {DONALD GIROD},
     title = {On the {Functional} {Equation}},
     journal = {Aequationes mathematicae},
     pages = {157--164},
     publisher = {mathdoc},
     volume = {9},
     year = {1973},
     zbl = {0276.39005},
     url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136342/}
}