[1] I. Namioka R. R. Phelps:
Banach spaces which are Asplund spaces. Duke Math. J. 42 (1975), No. 4, 735-750.
MR 0390721
[2] J. P. R. Christensen P. S. Kenderov:
Dense strong continuity of mappings and the Radon-Nikodym property. Københavns Univ., Mat. Inst. 1982, No. 17 (preprint).
MR 0753064
[3] Ch. Stegall:
A class of topological spaces and differentiation of functions on Banach spaces. Vorlesungen aus dem Fachbereich Mathematik der Universität Essen, Heft 10, 1983, 63-77.
MR 0730947 |
Zbl 0531.46015