TY  - JOUR
AU  - Fisher, Stephen
TI  - Approximation by Unimodular Functions
JO  - Canadian journal of mathematics
PY  - 1971
SP  - 257
EP  - 269
VL  - 23
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-025-4/
DO  - 10.4153/CJM-1971-025-4
ID  - 10_4153_CJM_1971_025_4
ER  -