- Author: Nils Langer (editor), Winifred Davies (editor)
- Language: English
- Year: 2005
- Author: Nils Langer
- Language: English
- Year: 2001
- Author: Stephan Elspaß (editor), Nils Langer (editor), Joachim Scharloth (editor), Wim Vandenbussche (editor)
- Language: English
- Year: 2007
- Author: Nils Langer
- Language: English
- Year: 2001
- Author: Nils Langer Steffan Davies Wim Vandenbussche
- Language: English
- Year: 2011
- Author: Nils Langer W. V. Davies
- Language: English
- Year: 2005