KARTONO, K.; NURHIKMAYATI, I. . Development of a Trigonometric Wheel to Improve Students’ Mathematical Problem-Solving Ability. Jurnal Pendidikan Matematika Universitas Lampung, [S. l.], v. 14, n. 2, p. 116–131, 2026. DOI: 10.23960/mtk/v14i2.pp116-131. Disponível em: https://jurnal.pbs.fkip.unila.ac.id/index.php/jpm/article/view/1808. Acesso em: 8 jul. 2026.