4
by Gherardi, Vanna
Published 2001
CLUEB

5
by Valleriani, Antonio
Published 2004
Armando

7
by Valitutti, Salvatore
Published 1979
Cadmo

9
Published 2002
Associazione italiana editori, Ufficio studi

10
Published 2004
Associazione italiana editori, Ufficio studi

11
Published 2003
Associazione italiana editori, Ufficio studi

12
by Virgili, Roberto
Published 2001
Firenze university press

13
by Elia, Giuseppe
Published 2003
Guerini scientifica

18
by Bottero, Enrico
Published 2003
CLUEB

19
by Zannotti, Luciano
Published 2001
Firenze university press