C. Pautasso, O. Zimmermann, и F. Leymann. WWW '08: Proceeding of the 17th international conference on World Wide Web, стр. 805-814. New York, ACM, (2008)
F. Steinicke, H. Weltzel, G. Bruder, и K. Hinrichs. Eurographics Symposium on Virtual Environments (EGVE), (Short Paper and Poster Proceedings), стр. 31--34. ACM, ACM Press, (2008)(acceptance rate 17\%).