1. M. Archer, G. Fink, L. Yang, Linking Other Theorem Provers to HOL Using PM: Proof Manager, Proceedings of the 1992 International Workshop on the HOL Theorem Proving System and its Applications, North-Holland 1993.
2. R. J. Boulton, A Lazy Approach to Fully-Expansive Theorem Proving, Proceedings of the 1992 International Workshop on the HOL Theorem Proving System and its Applications, North-Holland 1993.
3. P. Bullen, Non-absolute integrals: A survey, Real Analysis Exchange, vol. 5 pp. 195–259, 1980.
4. J. C. Burkill, The Lebesgue Integral, Cambridge Tracts in Mathematics and Mathematical Physics no. 44, Cambridge University Press 1965.
5. D. Clément, F. Montagnac, V. Prunet, Integrated Software Components: a Paradigm for Control Integration, Proceedings of the European Symposium on Software Development Environments and CASE Technology, Königwinter, Springer-Verlag LNCS 509, June 1991.