Combining regression and classification methods for improving automatic speaker age recognition. - Charl Johannes van Heerden; Etienne Barnard; Marelie H. Davel; Christiaan van der Walt; Ewald van Dyk; Michael Feld; Christian A. Müller (ICASSP, 2010)

A Support Vector Machine Approach to Detect Financial Statement Fraud in South Africa: A First Look. - Stephen O. Moepya; Fulufhelo V. Nelwamondo; Christiaan van der Walt (ACIIDS (2), 2014)

Variable Kernel Density Estimation in High-Dimensional Feature Spaces. - Christiaan Maarten van der Walt; Etienne Barnard (AAAI, 2017)

Unsupervised feature learning for spam email filtering. - Melvin Diale; Turgay Çelik 001; Christiaan van der Walt (Comput. Electr. Eng., 2019)