TIPPER, John C. Surface Modelling Techniques. Bulletin (Kansas Geological Survey), [S. l.], p. 1–108, 1979. DOI: 10.17161/kgsbulletin.no.23594. Disponível em: https://journals.ku.edu/kgsbulletin/article/view/23594. Acesso em: 6 apr. 2025.