Glancing through the list of the series “Atti delle 'Settimane di Studi' e altri Convegni” one can easily notice the absence of numbers from 14 to 18 – which correspond to the Weeks from 1982 to 1986. It was a difficult period for the Institute, characterised by financial and managerial problems that prevented the publication of the volumes. Between 1999 and 2000, after collecting the papers and audio materials relating to the Study Weeks from 1983 to 1986,  these 4 cd-roms were published