- Author: Theodore G. Th. Pigeaud H. J. de Graaf (auth.)
- Language: English
- Year: 1976
- Author: Rene van Leuken Reinder Nouta Alexander de Graaf (auth.) Dimitrios Soudris Peter Pirsch Erich Barke (eds.)
- Language: English
- Year: 2000
- Author: S. Webb (auth.) C. N. de Graaf M. A. Viergever (eds.)
- Language: English
- Year: 1988
- Author: J. E. Blundell C. de Graaf (auth.) Riaz Khan (eds.)
- Language: English
- Year: 1993
- Author: Willibrord de Graaf Robert Maier (auth.) Willibrord de Graaf PhD Robert Maier PhD (eds.)
- Language: English
- Year: 1994
- Author: L. Eggeling H. Sahm A. A. de Graaf (auth.) H. Sahm C. Wandrey (eds.)
- Language: English
- Year: 1996
- Author: Robin A. de Graaf(auth.)
- Language: English
- Year: 2007