State-space analysis of soil data: an approach based on space-varying regression models . Scientia Agricola, [S. l.], v. 60, n. 2, p. 371–376, 2003. DOI: 10.1590/S0103-90162003000200023. Disponível em: https://www.revistas.usp.br/sa/article/view/21857.. Acesso em: 1 jun. 2024.