You seem to be attempting to access an item that has been removed from the repository.
There is a later version of the item you are trying to access:
Castelli, Stefano and Pepe, Alessandro and Addimando, Loredana
(2011)
Monitorare la soddisfazione nella didattica on-line: quality assessment in virtual classroom (QUAS-VC).
In: Pieri, M. and Diamantini, D. and Bonfils, P., (eds.)
Ubiquitous Learning.
Guerini, Milano.
ISBN 978-88-6250-227-6