KRAPAVICKAITĖ, D. Estimation of Some Proportion in a Clustered Population. Nonlinear Analysis: Modelling and Control, [S. l.], v. 14, n. 4, p. 473–487, 2009. DOI: 10.15388/NA.2009.14.4.14469. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/14469. Acesso em: 8 may. 2025.