VIYANTI, Viyanti; RIZKI EKA SHINTYA; UNDANG ROSIDIN; AGUS SUYATNA; NOOR FARAWAHIDAH. Analysis of Project-Based Problem-Solving Skills of Optical Equipment Materials with Heller and Heller Steps. Jurnal Pendidikan IPA Indonesia, [S. l.], v. 14, n. 2, 2025. DOI: 10.15294/jpii.v14i2.23810. Disponível em: https://journal.unnes.ac.id/journals/jpii/article/view/23810. Acesso em: 5 dec. 2025.