@article{AM2_1978__18_136803,
     author = {W. Schwarz and A. Ivic},
     title = {Remarks on some number-theoretical functional equations. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {399--400},
     year = {1978},
     volume = {18},
     url = {http://geodesic.mathdoc.fr/item/AM2_1978__18_136803/}
}