Trizio, Massimo, and Stefania Donadio. “Stick, Twine and a Pinch of the Internet: We Measure the Earth Today With the Method of Eratosthenes”. EDiMaST: Experiences of Teaching with Mathematics, Sciences and Technology 50 (June 3, 2020): 649-673. Accessed September 22, 2020. https://www.edimast.it/index.php/edimast/article/view/67.