Multimedia Teleservices Modelled with the OSI Application Layer Structure. - Erwin van Rijssen; Ing Widya; Eddy Michiels (COST 237 Workshop, 1995)

Tele-Education Process Modelling Supported by The ODP Enterprise Viewpoint Language. - Cees Volman; Val Jones 001; Marten van Sinderen; Ing Widya; Eddy Michiels (EDOC, 1997)

Enterprise Modelling for an Educational Information Infrastructure. - Ing Widya; Cees Volman; Stanislav Pokraev; Italo De Diana; Eddy Michiels (ICEIS (2), 2001)