J. D. Graaff

Presence as the Defining Factor in a VR Application

Thomas C. Meyer, L. Hodges, R. Kooper, 1994 .

Developing interactive systems: A perspective on supporting ill-structured work

Dietz, J. J. De Graaff, J. D. Graaff, 2001 .

Virtual Environments for Treating the Fear of Heights

Rob Kooper, Larry F. Hodges, Max M. North, 1995, Computer.

Presence as the Defining Factor in a VR Application

Thomas C. Meyer, James S. Williford, L. Hodges, 1994 .