- Author: Shirlee Emmons Alma Thomas
- Language: English
- Year: 1998
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- Language: English
- Year: 2015
- Author: Antonio La Penna Rodolfo Funari Gerard Duursma
- Language: Italian
- Year: 2015
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- Language: German
- Year: 2015
- Author: Francesco Bracci
- Language: Italian
- Year: 2014
- Author: Giuseppe Dimatteo
- Language: Italian
- Year: 2014
- Author: Tayeb Salih Ibrahim Salahi
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- Year: 1994
