
- Author: Hubert Pöppel
- Language: Spanish
- Year: 2001

- Author: Hubert Pöppel
- Language: German
- Year: 2019

- Author: Jochen Mecke (editor), Ralf Junkerjürgen (editor), Hubert Pöppel (editor)
- Language: Spanish, Castilian
- Year: 2017

- Author: Hubert Pöppel (editor), Miguel Gomes (editor)
- Language: Spanish, Castilian
- Year: 2008

- Author: Hubert Pöppel Miguel Gomes
- Language: Spanish
- Year: 2008