OLEA, R.A. Systematic Sampling of Spatial Functions. Bulletin (Kansas Geological Survey), [S. l.], p. 1–57, 1984. DOI: 10.17161/kgsbulletin.no.23596. Disponível em: https://journals.ku.edu/kgsbulletin/article/view/23596. Acesso em: 6 apr. 2025.