PATTERSON, T.; JENNY, B. The Development and Rationale of Cross-blended Hypsometric Tints. Cartographic Perspectives, [S. l.], n. 69, p. 31–46, 2011. DOI: 10.14714/CP69.20. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp69-patterson-jenny. Acesso em: 31 jan. 2023.