RAMADHANI, Fitriana Dewi; WATI, Mustika; MISBAH, Misbah; WIYONO, Ketang. The Validity of Electronic Learning Materials Optical Instruments Based on Authentic Learning to Train Students’ Problem Solving Skills. Kasuari: Physics Education Journal (KPEJ), [S. l.], v. 4, n. 2, p. 78–89, 2021. DOI: 10.37891/kpej.v4i2.212. Disponível em: https://journalfkipunipa.org/index.php/kpej/article/view/212. Acesso em: 22 apr. 2026.