Dimmel, J., Pandiscio, E. and Bock, C. (2021) “Multiplication by Sunlight: How Can a Geometric Definition Be Realized in a Physical Tool?”, Journal of Mathematics Education at Teachers College, 12(1), pp. 9–16. Available at: https://journals.library.columbia.edu/index.php/jmetc/article/view/7573 (Accessed: 27 September 2022).