@article{JDM_1975__77_146647,
     author = {Wladyslaw Narkiewicz},
     title = {Some {Recent} {Developments} in three {Classical} {Problems} of {Number} {Theory.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {55--65},
     publisher = {mathdoc},
     volume = {77},
     year = {1975},
     zbl = {0309.10001},
     url = {http://geodesic.mathdoc.fr/item/JDM_1975__77_146647/}
}