Rule-based versus probabilistic approaches to the diagnosis of faults in wastewater treatment processes. - H. G. Chong; William J. Walley (Artif. Intell. Eng., 1996)

Self-Organising Maps for the Classification and Diagnosis of River Quality from Biological and Environmental Data. - William J. Walley; Raymond W. Martin; Mark O'Connor (ISESS, 1999)

An Information Theoretic Self-Organising Map with Disaggregation of Output Classes. - Mark O'Connor; William J. Walley (ICEIS, 2000)

Identification of macro-invertebrate taxa as indicators of nutrient enrichment in rivers. - M. F. Paisley; William J. Walley; D. J. Trigg (Ecol. Informatics, 2011)