| 2010 | EUROGP | Sub-tree Swapping Crossover and Arity Histogram Distributions. | Stephen Dignum, Riccardo Poli |
| 2009 | EUROGP | Extending Operator Equalisation: Fitness Based Self Adaptive Length Distribution for Bloat Free GP. | Sara Silva, Stephen Dignum |
| 2009 | SIGIR | Using Domain Models for Context-Rich User Logging. | Stephen Dignum, Yunhyong Kim, Udo Kruschwitz, Dawei Song, Maria Fasli, Anne N. De Roeck |
| 2008 | EUROGP | Operator Equalisation and Bloat Free GP. | Stephen Dignum, Riccardo Poli |
| 2008 | EUROGP | Crossover, Sampling, Bloat and the Harmful Effects of Size Limits. | Stephen Dignum, Riccardo Poli |
| 2008 | EUROGP | The Effects of Constant Neutrality on Performance and Problem Hardness in GP. | Edgar Galvn Lpez, Stephen Dignum, Riccardo Poli |
| 2008 | PPSN | Sub-tree Swapping Crossover, Allele Diffusion and GP Convergence. | Stephen Dignum, Riccardo Poli |
| 2007 | EUROGP | On the Limiting Distribution of Program Sizes in Tree-Based Genetic Programming. | Riccardo Poli, William B. Langdon, Stephen Dignum |
| 2007 | GECCO | Generalisation of the limiting distribution of program sizes in tree-based genetic programming and analysis of its effects on bloat. | Stephen Dignum, Riccardo Poli |
| 2004 | GECCO | Multi-agent Foreign Exchange Market Modelling Via GP. | Stephen Dignum, Riccardo Poli |