@article{AM2_1984__27_137013,
     author = {Piotr W. Cholewa},
     title = {Remarks on the stability of functional equations.},
     journal = {Aequationes mathematicae},
     pages = {76--86},
     year = {1984},
     volume = {27},
     zbl = {0549.39006},
     url = {http://geodesic.mathdoc.fr/item/AM2_1984__27_137013/}
}