- Author: Irizarry Christine, Guénoun Denis
- Language: English
- Year: 2013
- Author: Hirschberger Johannes, Martínez Gómez Luis
- Language: Spanish
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- Author: John H. Arnold
- Language: English
- Year: 2000
- Author: Guillermo Fraile
- Language: Spanish
- Year: 1997
- Author: Preve Costanzo
- Language: Italian
- Year: 2013
- Author: Schelling Friedrich Wilhelm Joseph von, Villacañas Berlanga José Luis
- Language: Spanish
- Year: 1990