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- Language: English
- Year: 2000
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- Year: 2006
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- Year: 1998
- Author: Rosamond McKitterick
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- Year: 1995
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- Year: 1999
- Author: Michael Jones
- Language: English
- Year: 2000
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- Language: English
- Year: 2004
- Author: David Luscombe Jonathan Riley-Smith
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- Year: 2004
- Author: Rosamond McKitterick
- Language: English
- Year: 1995
- Author: David Luscombe Jonathan Riley-Smith
- Language: English
- Year: 2004