Haqq AA, Wahid S, Izzati N, Riyanto OR, Sulistiawati S, Alves DA. The effects of e-problem-based learning on students’ geometry problem-solving performance across Polya’s stages. J. Elemen [Internet]. 2026 May 6 [cited 2026 Jun. 18];12(2):484-500. Available from: https://e-journal.hamzanwadi.ac.id/index.php/jel/article/view/33540