with Barbeau, E. , 2010, Proofs as bearers of mathematical knowledge, in G. Hanna, H. N. Jahnke & H. Pulte (eds.), Explanation and proof in mathematics, Dordrecht, Springer, pp. 85-100.
with Jahnke, H. , Pulte, H. , 2010, Introduction, in G. Hanna, H. N. Jahnke & H. Pulte (eds.), Explanation and proof in mathematics, Dordrecht, Springer, pp. 1-13.
with Jahnke, H. , Pulte, H. (eds) , 2010a, Explanation and proof in mathematics: philosophical and educational perspectives, Springer, Dordrecht.