Viviers, W., L. Cuyvers, E. Steenkamp, S. Grater, M. Matthee, and W. Krugell. “Identifying New Product And Service Export Opportunities For South Africa Using A Decision Support Model”. International Business & Economics Research Journal (IBER), vol. 13, no. 6, Oct. 2014, pp. 1403-18, doi:10.19030/iber.v13i6.8930.