 He also presided from last 1994 to 1996 and from 27 September 1996 to 29 May 2001 over the Parliamentary Commission on Terrorism concerning the "Years of Lead", created by a 1988 law to investigate about terrorism in Italy till 2001.At end of the commission experience he wrote a book with the writer Giovanni Fasanella, describing a long years "low intensity" civil war in Italy, from 1945 till today.He was also part of the Elections Council and Parliamentary Immunity ("Giunta elezioni e immunità parlamentari"), as well as a member of the Commission on Institutional Reforms.