Abdi, H. & Williams, L. J. (2010). Principal component analysis. Wiley Interdisciplinary Reviews: Computational Statistics 2(4), 433-459.10.1002/wics.101
Davidescu, A. A., Paul, A. M. V., Gogonea, R. M. & Zaharia, M. (2015). Evaluating Romanian Eco-Innovation Performances in European Context. Sustainability 7(9), 12723-12757.10.3390/su70912723
Helfer, H. (2015). Social market economy: Towards a comprehensive composite index, Discussion Paper, Center for Interdisciplinary Economics, No. 6/2015.
Joerges, C. & Rödl, F. (2004). ‘Social Market Economy’as Europe’s Social Model?, EUI Working Paper, no. 2004/8, European University Instutite, Florence.
Mourão, P. (2007). Towards a Fiscal Illusion Index. MPRA Paper 5091. Munich, Germany: University of Munich. Retrieved from http://mpra.ub.uni-muenchen.de/9760/.
Nardo, M., Saisana, M., Saltelli, A., Tarantola, S., Hoffman, A., & Giovannini, E. (2005). Handbook on Constructing Composite Indicators: Methodology and User Guide. OECD Statistics Working Papers 2005/3. OECD Publishing. Retrieved from http://ictlogy.net/bibliography/reports/projects.php?idp=2308.
Nomikos, P., & MacGregor, J. F. (1994). Monitoring batch processes using multiway principal component analysis. AIChE Journal 40(8), 1361-1375.10.1002/aic.690400809
Van Hook, J.C. (2004). Rebuilding Germany: The Creation of the Social Market Economy 1945–1957, Cambridge University Press, 2004, ISBN 0-521-83362-0, p. 185.
Van Suntum, U., Gundel, S., Lurweg, M., Oelgemöller, J. (2012a). Dening a Modern Version of the Social Market Economy. In: Index of Modern Social Market Economy. Explorative Study. Bertelsmann Stiftung, Gütersloh.
Wrobel, R. M. (2012). The social market economy as a model for sustainable growth in developing and emerging countries. Economic and Environmental Studies, 12(1), 47-63.