Yanti R, Hutapea NM, Anggraini RD. The development of problem-based learning worksheets to facilitate mathematical problem-solving skills in relation and function topics. JA [Internet]. 2024 Aug. 30 [cited 2024 Sep. 27];7(1):85-94. Available from: https://journal.upp.ac.id/index.php/absis/article/view/2480