@inbook{Dalla Zuanna2004a,
author = {Dalla Zuanna, G. and Crisafulli, C.},
title= {The survey on Italian students: theoretical background and the framework of data collection},
year = {2004a},
editor = {Dalla Zuanna, G.},
editor = {Crisafulli, C.},
pages = {77--86},
}