@misc{10_4153_CMB_1968_018_5,
     title = {On a {Theorem} of {Niven}},
     journal = {Canadian mathematical bulletin},
     pages = {145--145},
     year = {1968},
     volume = {11},
     number = {2},
     doi = {10.4153/CMB-1968-018-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1968-018-5/}
}