1. Bardram JE (1997) Plans as situated action: an activity theory approach to workflow systems. Paper presented at European conference on computer supported cooperative work, Lancaster, UK, pp 17–32
2. Betbeder M-L (2003) Symba : un environnement malléable support d’activités collectives en contexte d’apprentissage. Thèse de doctorat, Le Mans, Université du Maine, France, 2003, 238 pp
3. Betbeder M-L, Tchounikine P (2003) Symba: a framework to support collective activities in an educational context. In: International conference on computers in education (ICCE 2003), 2–5 décembre 2003, Hong Kong, China, pp 188–196
4. Betbeder M-L, Tchounikine P (2004) Modélisation et perception de l’activité dans l’environnement Symba . In: Actes de RFIA’04, 28–30 janvier 2004, Toulouse, France, pp 1217–1225
5. Bourguin G, Derycke A (2001) Integrating the CSCL activities into virtual campuses: foundation of a new infrastructure for distributed collective activities. Paper presented at Euro-CSCL, Maastricht, The Netherlands, pp 123–130