An improved exponential ratio estimator for post-stratified sampling designs. African Scientific Reports, [S. l.], v. 5, n. 2, p. 479, 2026. DOI: 10.46481/asr.2026.5.2.479. Disponível em: https://www.asr.nsps.org.ng/index.php/asr/article/view/479. Acesso em: 16 aug. 2026.