Simangunsong, Ika Trisni, et al. “Improvement of High School Students’ Physics Problem Solving Skills Through Problem Based Learning Assisted by LKPD (Student Worksheets)”. Lensa: Jurnal Kependidikan Fisika, vol. 12, no. 2, Dec. 2024, pp. 275-86, doi:10.33394/j-lkf.v12i2.13544.