RITZMANN, S.; URBAN, P. Designing the Spatial star as a three-dimensional derivate of the Siemens star and developing the methods to determine the accuracy, resolution and spatial frequency response from a 3D scan of the Spatial star. Journal of Print and Media Technology Research, [S. l.], v. 10, n. 4, p. 231–245, 2022. Disponível em: http://jpmtr.org/index.php/journal/article/view/31. Acesso em: 6 may. 2024.