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2. Ball, D. L., & Bass, H. (2009). With an eye on the mathematical horizon: Knowing mathematics for teaching to learners’ mathematical futures. In M. Neubrand (Ed.), Beiträge zum Mathematikunterricht 2009: Vorträge auf der 43. Tagung für Didaktik der Mathematik vom 2.-6. März 2009 in Oldenburg (Vol. 1, pp. 11–22). Münster: WTM-Verlag. Retrieved from
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5. Baumert, J., Blum, W., & Neubrand, M. (2004). Drawing the lessons from PISA-2000: Long term research implications. Gaining a better understanding of the relationship between system inputs and learning outcomes by assessing instructional and learning processes as mediating factors. In D. Lenzen, J. Baumert, R. Watermann, & U. Trautwein (Eds.), PISA und die Konsequenzen für die erziehungswissenschaftliche Forschung. Zeitschrift für Erziehungswissenschaft, Beiheft 3/2004, pp. 143–158. (ISBN 978-3-8100-4024-4)