by Durinck, Guy, Thys, Willy, Rembert, Pascal, Izbicki, Jean-Louis
Published in Ultrasonics (01.08.2002)

by Durinck, Guy, Thys, Willy, Rembert, Pascal, Izbicki, Jean-Louis
Published in Wave motion (01.03.2002)

by Durinck, Guy, Thys, Willy, Rembert, Pascal, Izbicki, Jean-Louis
Published in Ultrasonics (01.06.1999)

by Laperre, J, Thys, W
Published in European journal of physics (01.09.1992)

by Guy Ryder and Willy Thys
Published in ft.com (27.10.2006)

by GUY RYDER and WILLY THYS
Published in The Financial times (London ed.) (27.10.2006)

by JOHN MONKS, GUY RYDER and WILLY THYS
Published in The Financial times (London ed.) (28.10.2004)

by Poul Nyrup Rasmussen, Guy Ryder, Willy Thys and Giampiero Alhadeff
Published in The Guardian (London) (10.12.2005)