“Analisis higher order thinking skills (HOTS) siswa dalam menyelesaikan open ended problems matematika” (2020) Prosiding Seminar Nasional Matematika dan Pendidikan Matematika, 5, pp. 88–95. Available at: https://conference.upgris.ac.id/index.php/senatik/article/view/866 (Accessed: 28 August 2026).