@article{AM2_1973__9_136371,
     author = {J. VAN DER MARK},
     title = {On the {Functional} {Equation} of {Cauchy} {(Short} {Communication)}},
     journal = {Aequationes mathematicae},
     pages = {307--308},
     publisher = {mathdoc},
     volume = {9},
     year = {1973},
     url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136371/}
}