Gass, Robert H. (california State University, Seiter, John S. (utah State University (3) Nicholas, John M., Steyn, Herman (university Of Pretoria (2) Van Dooren, Wouter (universiteit Antwerpen, Bouckaert, Geert (katholieke Universiteit, Halligan, John (university Of Canberra (1) Gass, Robert H, Seiter, John S (1) Gingell, John (university Of Northampton, Winch, Christopher (kings College (1)