@ARTICLE{Welbergenvan620:2006,
 	author={H. van Welbergen and A. Nijholt and D. Reidsma and J. Zwiers},
 	title={Presenting in Virtual Worlds: Towards an Architecture for a 3D Presenter explaining 2D-Presented Information},
 	journal={IEEE Intelligent Systems},
 	year=2006,
 	volume=21,
 	number=5,
 	pages={47--99},
 	note={ISSN=1541-1672},
}