1. D.S. Bridges, Review ofComputability in Analysis and Physics (by M. B. Pour-El and J. I. Richards),Bull. Amer. Math. Soc. (New Series) 24, 216–228 (1991).
2. J. Hadamard, Sur les problemes aux dérivées partielles et leur signification physique, Princeton Univ. Bull. 13,49–52 (1902).
3. J. Hadamard,Lectures on the Cauchy Problem in Linear Partial Differential Equations, Dover, New York, 1952.
4. J. L. Kelley and T. P. Srinivasan,Measure and Integral, Volume I, Graduate Texts in Mathematics 116, Springer-Verlag, New York, 1988.
5. M A. Kon, K. Ritter, and A. G. Werschulz, On the average case solvability of ill-posed problems,J. Complexity 7,220–224 (1991).