1. Haskell Implementation of IC-Reals for Exact Real Computation. Imperial College London.
http://www.doc.ic.ac.uk/exact-computation/Haskell
2. Abramsky, S., Jung, A.: Domain theory. In: Abramsky, S., Gabbay, D.M., Maibaum, T.S.E. (eds.) Handbook of Logic in Computer Science, vol. 3. Clarendon, Oxford (1994)
3. Lecture Notes in Computer Science;A Bauer,2002
4. Clarke, F.H.: Optimization and Nonsmooth Analysis. Wiley, New York (1983)
5. Di Gianantonio, P.: A functional approach to real number computation. Ph.D. thesis, University of Pisa (1993)