Wilfred Owen
Barry Ubbels
Jorie Horsthuis
John Hibbs
National Institute of Law Enforcement and Criminal Justice.
Wijnand W. Veeneman
World Bank
A. Rühl
Carmen Hass-Klau
Samuel Jaramillo
Nancy W. Sheldon
Richard L. Oram
ECMT Seminar (1989 Dunkerque, France)
C. A. Nash
Anita Schöbel
Roel Nahuis