Isn't That Spatial?: Distance and Communication in a 2-D Virtual Environment. - Dean H. Krikorian; Jae-Shin Lee; Tamara Makana Chock; Chad Harms (J. Comput. Mediat. Commun., 2000)

Towards A More Robust Theory and Measure of Social Presence: Review and Suggested Criteria. - Frank A. Biocca; Chad Harms; Judee K. Burgoon (Presence Teleoperators Virtual Environ., 2003)

Illustrating the "virtual" in virtual schooling: Challenges and strategies for creating real tools to prepare virtual teachers. - Niki Davis; M. D. Peggy Roblyer; Amina Charania; Rick Ferdig; Chad Harms; Lily Ko Li Compton; Mi Ok Cho (Internet High. Educ., 2007)