BRADSHAW, R.; SANCHEZ, A. The comparison of maps and the use of orthogonal polynomials in trend surface analysis orthogonal polynomials in trend surface analysis: an example applied to Chile. Revista de Geografía Norte Grande, [S. l.], n. 11, p. 31–43, 1984. Disponível em: https://ojs.uc.cl/index.php/RGNG/article/view/39523. Acesso em: 19 may. 2024.