Y. Shen, T. Jeng, and Y. Hsu. Cooperative Design, Visualization, and Engineering, page 102--109. Berlin, Heidelberg, Springer Berlin Heidelberg, (2011)
R. Keller, S. Wolfe, J. Chen, J. Rabinowitz, and N. Mathe. Selected papers from the sixth international conference on World Wide Web, page 1103--1114. Essex, UK, Elsevier Science Publishers Ltd., (1997)
R. Keller, S. Wolfe, J. Chen, J. Rabinowitz, and N. Mathe. Selected papers from the sixth international conference on World Wide Web, page 1103--1114. Essex, UK, Elsevier Science Publishers Ltd., (1997)