OLEA, R.A. Measuring Spatial Dependence with Semivariograms. Bulletin (Kansas Geological Survey), [S. l.], p. 1–29, 1977. DOI: 10.17161/kgsbulletin.no.23593. Disponível em: https://journals.ku.edu/kgsbulletin/article/view/23593. Acesso em: 6 apr. 2025.