SABRY, Ibrahim. Six sigma methodology used to improve the mechanical properties for friction stir weldingof aluminum pipes. Management and Production Engineering Review, [S. l.], v. 11, n. 1, p. 73–78, 2020. DOI: 10.24425/mper.2020.132945. Disponível em: https://wydawnictwo.pan.pl/index.php/mper/article/view/5366. Acesso em: 20 sep. 2026.