Sihombing B, Purba GID. Development of E-Modules Assisted by Geogebra Software to Improve High School Students’ Mathematical Problem Solving Abilities . jpm [Internet]. 2025 Jan. 31 [cited 2025 Feb. 23];16(1):44-51. Available from: http://jpm.uho.ac.id/index.php/journal/article/view/201