Damanik, T. A. P., E. Julyanti, and L. H. Pasaribu. “Analysis of the Mathematical Concept Understanding Ability of VII Grade Junior High School Students ”. EduMatSains : Jurnal Pendidikan, Matematika Dan Sains, Vol. 9, no. 2, Jan. 2025, pp. 55-65, doi:10.33541/edumatsains.v9i2.6397.