Supervised Training Using an Unsupervised Approach to Active Learning. - Andries P. Engelbrecht; R. Brits (Neural Process. Lett., 2002)

Scalability of niche PSO. - R. Brits; Andries P. Engelbrecht; Frans van den Bergh (SIS, 2003)

Locating multiple optima using particle swarm optimization. - R. Brits; Andries P. Engelbrecht; Frans van den Bergh (Appl. Math. Comput., 2007)