Ringwood, John and Butler, Shane (2004) Optimisation of a wave energy converter. In: IFAC Conference on Control Applications in Marine Systems - CAMS 2004, July 7-9 2004, Ancona, Italy.

Butler, Shane and Ringwood, John (2010) Particle Filters for Remaining Useful Life Estimation of Abatement Equipment used in Semiconductor Manufacturing. In: 2010 Conference on Control and Fault Tolerant Systems, October 6-8, 2010, Nice, France.

Butler, Shane and Ringwood, John (2004) Stochastic Search in Data-Based Modelling of Dynamic Systems. Proceedings, the Irish Signals and Systems Conference ISSC 2004, Belfast . ISSN 0537-9989;