@article{10_4064_aa_8_4_465_467,
     author = {T. Estermann},
     title = {Note on a paper of {A.} {Rotkiewicz}},
     journal = {Acta Arithmetica},
     pages = {465--467},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {1962},
     doi = {10.4064/aa-8-4-465-467},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-8-4-465-467/}
}