with Bailey, D. H. , 2017, A computational mathematics view of space, time and complexity, in S. Wuppuluri & G. Ghirardi (eds.), Space, time and the limits of human understanding, Dordrecht, Springer, pp. 403-415.
, 2007a, Aesthetics for the working mathematician, in N. Sinclair, D. Pimm & W. Higginson (eds.), Mathematics and the aesthetic, Dordrecht, Springer, pp. 21-40.