@article{10_4064_aa_38_4_341_345,
     author = {Tadashige Okada},
     title = {On an extension of a theorem of {S.} {Chowla}},
     journal = {Acta Arithmetica},
     pages = {341--345},
     publisher = {mathdoc},
     volume = {38},
     number = {4},
     year = {1980},
     doi = {10.4064/aa-38-4-341-345},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-38-4-341-345/}
}