ISMAEEL, M.; SABAH, N. Spatial stochastic Process and estimation of variogram Function. Journal of Education and Science, [S. l.], v. 21, n. 1, p. 138–148, 2008. DOI: 10.33899/edusj.2008.51259. Disponível em: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/41404. Acesso em: 10 sep. 2025.