- Author: Rachel Harraway Attilia Lavagno Laura Danielli Derek Sellen Philippa Bowen Margherita Cumino
- Language: Italian
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- Year: 2019
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- Language: English
- Year: 2023
- Author: Steven J. Matthiesen
- Language: English
- Year: 2023
- Author: Enrique del Teso Martín
- Language: Spanish
- Year: 1990
- Author: Eugenio Coseriu
- Language: Spanish
- Year: 1996
