1. It's catching;Bannan;Brandweek,2000
2. Blair Witch, Hotmail et le marketing viral;Bernard;L'Expansion Management Review,2001
3. Viral marketing;Borroff;Precision Marketing,2000
4. Les communautés virtuelles: Un potentiel marketing encore peu exploré;Brodin;Décisions Marketing,2000
5. The role of surprise in cognitive development;Charlesworth,1969