Wibowo T, Darmono PB, Azieta HN. An Analysis of the Ability to Understand Mathematical Concepts of Middle School Students in Completing Integer Operations. j. pend. mat. [Internet]. 2024 Oct. 14 [cited 2024 Nov. 21];16(1):29-44. Available from: https://jpm.ejournal.unsri.ac.id/index.php/jpm/article/view/159