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- [9] DENSE FRECHET DIFFERENTIABILITY OF MACKEY CONTINUOUS CONVEX-FUNCTIONS DOKLADI NA BOLGARSKATA AKADEMIYA NA NAUKITE, 1983, 36 (06): : 737 - 738
- [10] ON CONVEX-FUNCTIONS HAVING POINTS OF GATEAUX DIFFERENTIABILITY WHICH ARE NOT POINTS OF FRECHET DIFFERENTIABILITY CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 1993, 45 (06): : 1121 - 1134