BHATTACHARYYA, H. P. A Note on Some Results of Friction Between Non-metals. Defence Science Journal, [S. l.], v. 5, n. 3, p. 355–358, 2014. DOI: 10.14429/dsj.5.7531. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7531. Acesso em: 2 jul. 2025.