TY  - JOUR
AU  - Whitfield, J. H. M.
TI  - Quasi-Differentiable Norms
JO  - Canadian mathematical bulletin
PY  - 1974
SP  - 407
EP  - 408
VL  - 17
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-075-4/
DO  - 10.4153/CMB-1974-075-4
ID  - 10_4153_CMB_1974_075_4
ER  -