1. Asperti, A., Guidi, F., Padovani, L., Sacerdoti Coen, C., Schena, I.: Mathematical Knowledge Management in HELM. Annals of Mathematics and Artificial Intelligence 38(1), 27–46 (2003)
2. Lecture Notes in Computer Science;G. Bancerek,2003
3. The Coq proof-assistant,
http://coq.inria.fr
4. Di Lena, P.: Generazione automatica di stylesheet per notazione matematica. Master thesis. University of Bologna (2003)
5. Guidi, F., Sacerdoti Coen, C.: Querying Distributed Digital Libraries of Mathematics. In: Proceedings of Calculemus 2003, 11th Symposium on the Integration of Symbolic Computation and Mechanized Reasoning. Aracne Editrice (2003)