F. Decortis, A. Rizzo, und B. Saudelli. Interacting with Computers, 15 (6):
801 - 830(2003)From Computer Artefact to Instrument for Mediated Activity .Part 2 Learning Environments.
P. Rabardel, und G. Bourmaud. Interacting with Computers, 15 (5):
665 - 691(2003)From Computer Artefact to Instrument for Mediated Activity.Part 1 Organizational Issues.