NAIDOO, L. R.; NORTH, D.; ZEWOTIR, T.; ARNAB, R. Balanced modified systematic sampling in the presence of linear trend. South African Statistical Journal, [S. l.], v. 49, n. 2, p. 187–203, 2015. Disponível em: https://www.journals.ac.za/index.php/sasj/article/view/5641. Acesso em: 3 apr. 2026.