Gass, Robert H. (california State University, Seiter, John S. (utah State University (3) Van Dooren, Wouter, Bouckaert, Geert (katholieke Universiteit Leuven, Belgium), Halligan, John (university Of Canberra, Australia) (1) Van Dooren, Wouter (universiteit Antwerpen, Bouckaert, Geert (katholieke Universiteit, Halligan, John (university Of Canberra (1) Gass, Robert H, Seiter, John S (1) Gingell, John, Winch, Christopher (kings College (1)