Garzotto, F., and P. Paolini, Bringing Cultural Heritage Into Primary School Classrooms Through Web Technology, Figure 4, in J. Trant and D. Bearman (eds.). Museums and the Web 2008: Proceedings, Toronto: Archives & Museum Informatics. Published March 31, 2008. Consulted http://www.archimuse.com/mw2008/papers/garzotto/garzotto-fig4.html