KENNELLY, P. J. Hillshading With Oriented Halftones. Cartographic Perspectives, [S. l.], n. 43, p. 25–42, 2002. DOI: 10.14714/CP43.535. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp43-kennelly. Acesso em: 19 oct. 2024.