1. Bakker, A. (2004). Design research in statistics education – On symbolizing and computer tools [Dissertation, University of Utrecht].
2. Bakker, A., & Gravemeijer, K. (2004). Learning to reason about distributions. In D. Ben-Zvi & J. Garfield (Eds.), The challenge of developing statistical literacy, reasoning and thinking (pp. 147–168). Kluwer Academic Publishers. https://doi.org/10.1007/1-4020-2278-6_7
3. Ben-Zvi, D. (2018). Foreword. In A. Leavy, M. Meletiou-Mavrotheris, & E. Paparistodemou (Eds.), Statistics in early childhood and primary education (pp. vii–viii). Springer.
4. Biehler, R. (1997). Software for learning and for doing statistics. International Statistical Review, 65(2), 167–189. https://doi.org/10.1111/j.1751-5823.1997.tb00399.x
5. Biehler, R. (2007). Denken in Verteilungen – Vergleichen von Verteilungen (Thinking in distributions – comparing distributions). Der Mathematikunterricht, 53(3), 3–11.