@article{AMI_2001_28_a5,
     author = {Imre Kocsis},
     title = {On the stability of a sum form functional equation of multiplicative type},
     journal = {Annales mathematicae et informaticae},
     pages = {43--53},
     publisher = {mathdoc},
     volume = {28},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2001_28_a5/}
}