@article{AM2_1980__20_182381,
     author = {A. Ivic and W. Scharz},
     title = {Remarks on some number-theoretical functional equations.},
     journal = {Aequationes mathematicae},
     pages = {80--89},
     publisher = {mathdoc},
     volume = {20},
     year = {1980},
     zbl = {0435.10004},
     url = {http://geodesic.mathdoc.fr/item/AM2_1980__20_182381/}
}