| 1998 | Evolutionary Computation and the Tinkerer's Evolving Toolbox. | Philip G. K. Reiser |
| 1998 | A Dynamic Lattice to Evolve Hierarchically Shared Subroutines. | Alain Racine, Marc Schoenauer, Philippe Dague |
| 1998 | Efficient Evolution of Asymmetric Recurrent Neural Networks Using a PDGP-inspired Two-Dimensional Representation. | Joo Carlos Figueira Pujol, Riccardo Poli |
| 1998 | A Review of Theoretical and Experimental Results on Schemata in Genetic Programming. | Riccardo Poli, William B. Langdon |
| 1998 | An Evolutionary Hybrid Metaheuristic for Solving the Vehicle Routing Problem with Heterogeneous Fleet. | Luiz Satoru Ochi, Dalessandro Soares Vianna, Lcia Maria de A. Drummond, Andr O. Victor |
| 1998 | Concepts of Inductive Genetic Programming. | Nikolay I. Nikolaev, Vanio Slavov |
| 1998 | Building a Genetic Programming Framework: The Added-Value of Design Patterns. | Tom Lenaerts, Bernard Manderick |
| 1998 | Genetic Programming Bloat with Dynamic Fitness. | William B. Langdon, Riccardo Poli |
| 1998 | Fitness Causes Bloat: Mutation. | William B. Langdon, Riccardo Poli |
| 1998 | Non-destructive Depth-Dependent Crossover for Genetic Programming. | Takuya Ito, Hitoshi Iba, Satoshi Sato |
| 1998 | Where Does the Good Stuff Go, and Why? How Contextual Semantics Influences Program Structure in Simple Genetic Programming. | David E. Goldberg, Una-May O'Reilly |
| 1998 | Genetic Modelling of Customer Retention. | A. E. Eiben, A. E. Koudijs, Frank Slisser |
| 1998 | Speech Sound Discrimination with Genetic Programming. | Markus Conrads, Peter Nordin, Wolfgang Banzhaf |
| 1998 | Genetic Programming for Automatic Design of Self-Adaptive Robots. | Stphane Calderoni, Pierre Marcenac |
| 1998 | Evolving Coupled Map Lattices for Computation. | Claes Andersson, Mats G. Nordahl |
| 1998 | Immediate Transfer of Global Improvements to All Individuals in a Population Compared to Automatically Defined Functions for the EVEN-5, 6-PARITY Problems. | Ricardo Aler |
| 1998 | A Cellular-Programming Approach to Pattern Classification. | Giovanni Adorni, Federico Bergenti, Stefano Cagnoni |