POPUDNIAK, Y. Y.; ULCHENKO, T. V.; SHCHERBAK, A. S. Reamers of sphere are closed. Science and Transport Progress , [S. l.], n. 38, p. 162–164, 2011. DOI: 10.15802/stp2011/6831. Disponível em: https://stp.ust.edu.ua/article/view/6831. Acesso em: 3 may. 2024.