Heath, C. and Luff, P.: Disembodied conduct: Communication through video in a multi-media office environment, Proc. CHI’91, pp. 99-103(1991).
Isaacs, E. and Tang, J. C.: What Video Can and Cannot Do for Collaboration, Springer-Verlag Journal Multimedia Systems, Vol.2, pp. 63-73(1994).
Yamashita, J., Kuzuoka, H., Yamazaki, K. and Yamazaki, A.: Agora: Supporting Multi-participant Telecollaboration, Proc. HCI International 1999, Vol.2, pp. 543-547(1999).