Contradictions between the virtual and physical high school classroom: A third-generation Activity Theory perspective. - Elizabeth Murphy; María A. Rodríguez-Manzanares (Br. J. Educ. Technol., 2008)

Asynchronous and synchronous online teaching: Perspectives of Canadian high school distance education teachers. - Elizabeth Murphy; María A. Rodríguez-Manzanares; Michael K. Barbour (Br. J. Educ. Technol., 2011)