Maria G. Bartolini Bussi
with Ferri, F. (2005). Semiotic mediation in the primary school. In M. H. G. . Hoffmann, J. Lenhard, & F. Seeger (Eds.). Activity and sign (pp. 77-90). Dordrecht: Springer.
(2010). Historical artefacts, semiotic mediation and teaching proof. In G. Hanna, H. N. Jahnke, & H. Pulte (Eds.). Explanation and proof in mathematics (pp. 151-167). Dordrecht: Springer.