Assesment of Scaleable Database Architectures for CDR Analysis - An Experimental Approach. - Wijnand Derks; Sietse Dijkstra; Willem Jonker; Jeroen Wijnands (Databases in Telecommunications, 1999)

Experimenting NUMA for Scalable CDR Processing. - Wijnand Derks; Sietse Dijkstra; H. D. Enting; Willem Jonker; Jeroen Wijnands (DEXA, 2000)

Experimenting NT Cluster Technology for Massive CDR Processing. - Jeroen Wijnands; Sietse Dijkstra; Wijnand Derks; Willem Jonker (Databases in Telecommunications, 2001)

Multimedia information services enabling: an architectural approach. - Erik M. Boertjes; Willem Jonker; Jeroen Wijnands (ACM Multimedia Workshops, 2001)