TY  - JOUR
AU  - McLaughlin, D.
AU  - Poliquin, R.
AU  - Vanderwerff, J.
AU  - Zizler, V.
TI  - Second-Order Gâteaux Differentiable Bump Functions and Approximations in Banach Spaces
JO  - Canadian journal of mathematics
PY  - 1993
SP  - 612
EP  - 625
VL  - 45
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1993-032-9/
DO  - 10.4153/CJM-1993-032-9
ID  - 10_4153_CJM_1993_032_9
ER  -