Comparing the Roles of Representations in Fact to Face and Online Collaborations. - Daniel D. Suthers; Christopher D. Hundhausen; Laura E. Girardeau (ICCE, 2002)

Deictic Roles of External Representations in Face-to-Face and Online Collaboration. - Daniel D. Suthers; Laura E. Girardeau; Christopher D. Hundhausen (CSCL, 2003)

An Exploratory Comparison of the Roles of Representations in Face to Face and Online Collaborative Learning. - Daniel D. Suthers; Christopher D. Hundhausen; Laura E. Girardeau (HICSS, 2003)

Comparing the roles of representations in face-to-face and online computer supported collaborative learning. - Daniel D. Suthers; Christopher D. Hundhausen; Laura E. Girardeau (Comput. Educ., 2003)