Yarman Y, Yerizon Y, Dwina F, Murni D, Hevardani KA. Analysis of Concept Construction and Student Errors on the Topic of Double Integral Based on APOS Theory. j. pend. mat. [Internet]. 2024 Sep. 2 [cited 2024 Oct. 5];18(3):367-86. Available from: https://jpm.ejournal.unsri.ac.id/index.php/jpm/article/view/91