1. A proof that every Banach space is subreflexive;Bishop;Bull. Amer. Math. Soc.,1961
2. The support functionals of a convex set;E.,1963
3. Geometric Aspects of Convex Sets with the Radon-Nikodym Property;Bourgin,1983
4. On the subdifferentiability of convex functions;Brøndsted;Proc. Amer. Math. Soc.,1965