1. Über konvexe mengen in linaeren normierten räumen;Mazur;Studia Math,1933
2. Fréchet differentiability of convex functions;Asplund;Acta Math,1968
3. Banach spaces which are Asplund spaces;Namioka;Duke Math J,1975
4. Geometric Aspects of Convex Sets with the Radon-Nikodym Property. Lect Notes in Math 993;Bourgin,1983
5. Gâteaux Differentiability of Convex Functions and Topology, Weak Asplund Space;Fabian,1997