- Author: G. Baldini (curatore), A. Cento Bull (curatore)
- Language: Italian
- Year: 2009
- Author: Sylvan T. Runkel Alvin F. Bull
- Language: English
- Year: 2009
- Author: Bull Hans Peter, Ooyen Robert Chr. van, Wassermann Hendrik
- Language: German
- Year: 2022
- Author: Bull Hans Peter
- Language: German
- Year: 2005
- Author: Herbert Scheithauer, Anton Walcher, Stephan Warncke, Felix Klapprott, Heike Dele Bull
- Language: German
- Year: 2019
- Author: Michael Bull (editor) Les Back (editor)
- Language: English
- Year: 2020
- Author: Marcus Bull, Norman Housley
- Language: English
- Year: 2004
- Author: Valerie Alia, Simone Bull
- Language: English
- Year: 2005
- Author: Malcolm Bull
- Language: English
- Year: 2013
On Mercy
pdf
- Author: Malcolm Bull
- Language: English
- Year: 2019