1.
Vos P, Frejd P. Grade 8 students appropriating Sankey diagrams: The first cycle in an educational design research. j. math. educ. [Internet]. 2022 Aug. 17 [cited 2024 May 20];13(2):289-306. Available from: http://jme.ejournal.unsri.ac.id/index.php/jme/article/view/90