1. Pupils' proof potential
2. Testing and Assessment: A Progress Report
3. Baker, J.D. Students’ difficulties with proof by mathematical induction. Paper presented at the annual meeting of the American Educational Research Association. April8–12, New York, USA.
4. The Mathematical Understandings That Prospective Teachers Bring to Teacher Education
5. Ball, D.L., Hoyles, C., Jahnke, H.N. and Movshovitz‐Hadar, N. The teaching of proof.Proceedings of the International Congress of Mathematicians. Edited by: Tatsien, L.I. vol. 3, pp.907–20. Beijing: Higher Education Press.