- Author: José Luis Rivarola
- Language: Spanish, Castilian
- Year: 2000
- Author: Chiara Albertin (editor)
- Language: Spanish, Castilian
- Year: 2008
- Author: Roland Schmidt-Riese
- Language: Spanish, Castilian
- Year: 2003
- Author: Marta Fernández Alcaide
- Language: Spanish, Castilian
- Year: 2009
- Author: Rosario Navarro Gala
- Language: Spanish, Castilian
- Year: 2007
- Author: Elena Diez del Corral Areta
- Language: Spanish, Castilian
- Year: 2015
- Author: Samora Moisés Machel
- Language: Portuguese
- Year: 1981
- Author: coll.
- Language: Portuguese
- Year: 1989