Sari YM, Fiangga S, Milla YIE, Puspaningtyas ND. Exploring students’ proportional reasoning in solving guided-unguided area conservation problem: A case of Indonesian students. j. math. educ. [Internet]. 2023 Apr. 17 [cited 2024 May 20];14(2):375-94. Available from: http://jme.ejournal.unsri.ac.id/index.php/jme/article/view/292