@misc{10_4153_CMB_1974_019_5,
     title = {On {A} theorem of {Niven}},
     journal = {Canadian mathematical bulletin},
     pages = {109--110},
     year = {1974},
     volume = {17},
     number = {1},
     doi = {10.4153/CMB-1974-019-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-019-5/}
}