1. E.J. Beggs, J.V. Tucker, Computations via experiments with kinematic systems, Research Report 4.04, Department of Mathematics, University of Wales Swansea, March 2004 or Technical Report 5-2004, Department of Computer Science, University of Wales Swansea, March, 2004.
2. E.J. Beggs, J.V. Tucker, Newtonian systems, bounded in space, time, mass and energy can compute all functions, Research Report 4/05, Department of Mathematics, University of Wales Swansea, March 2005 or Technical Report 3-2005, Department of Computer Science, University of Wales Swansea, March, 2005.
3. O. Bournez, How much can analog and hybrid systems be proved (super-)Turing?, Applied Mathematics and Computation, this issue.
4. Incomputability in nature;Cooper,2003
5. Hypercomputation and the physical Church–Turing Thesis;Cotogno;British Journal for the Philosophy of Science,2003