@article{10_4153_CJM_1971_025_4,
     author = {Fisher, Stephen},
     title = {Approximation by {Unimodular} {Functions}},
     journal = {Canadian journal of mathematics},
     pages = {257--269},
     year = {1971},
     volume = {23},
     number = {2},
     doi = {10.4153/CJM-1971-025-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-025-4/}
}