- document
- Roberts, J.C. (author), Boyle, M.P. (author), Wienhold, P.D. (author), Ward, E.E. (author), White, G.J. (author) journal article 2002
- document
- Roberts, J.C. (author), White, G.J. (author) journal article 1999
- document
- Roberts, John (author) conference paper 1999