SUCIPTO, Try Adi. Measurement of Friction Coefficient between Glass and Rubik’s Beam on the Sloping Field using Rubik Lubricant. Journal of Natural Sciences and Mathematics Research, [S. l.], v. 5, n. 1, p. 7–9, 2019. Disponível em: https://journal.walisongo.ac.id/index.php/JNSMR/article/view/11023. Acesso em: 7 jun. 2025.