New policy challenges', ministerie van Economische Zaken en EIM, Nederland, 2002, en 'White Paper, Embracing innovation: entrepreneurship and American economic growth', National Commission on Entrepreneurship (NCOE), 2001.
New policy challenges, Ministerium für Wirtschaft und Wirtschaftsinstitut für KMU, Niederlande 2002, und White Paper, Embracing innovation: entrepreneurship and American economic growth, National Commission on Entrepreneurship (NCOE) 2001.