Penerapan problem based learning (PBL) untuk meningkatkan higher order thinking skill (HOTS) mahasiswa melalui lesson study. NOTASI: Jurnal Pendidikan Matematika, [S. l.], v. 1, n. 2, p. 59–68, 2023. DOI: 10.70115/notasi.v1i2.104. Disponível em: http://ejournal.ahs-edu.org/index.php/notasi/article/view/104.. Acesso em: 16 jan. 2026.