1. Barron, A.R.: Neural net approximation. In: Narendra, K. (ed.) Proc. 7th Yale Workshop on Adaptive and Learning Systems, pp. 69–72. Yale University Press (1992)
2. Barron, A.R.: Universal approximation bounds for superpositions of a sigmoidal function. IEEE Trans. on Information Theory 39, 930–945 (1993)
3. Bellman, R.: Dynamic Programming. Princeton University Press, Princeton (1957)
4. Bochner, S., Chandrasekharan, K.: Fourier Transform. Princeton University Press, Princeton (1949)
5. Braess, D.: Nonlinear Approximation Theory. Springer (1986)