1. The CerCo project, http://cerco.cs.unibo.it.
2. R. M. Amadio, N. Ayache, Y. Regis-Gianas, R. Saillard, Cerifying cost annotations in compilers, Tech. rep., Uni-versite Paris Diderot (Paris 7), Laboratoire PPS (2010).
3. D. P. Mulligan, C. Sacerdoti Coen, An executable for-malisation of the MCS-51 microprocessor in Matita, in: FMCAD, 2011, submitted.
4. User interaction with the Matita proof assistant;Asperti;Automated Reasoning,2007
5. The CompCert project, http://pauillac.inria.fr/∼xleroy/compcert/.