ROTA, B. J.; LAITILA, T. Calibrating on principal components in the presence of multiple auxiliary variables for nonresponse adjustment. South African Statistical Journal, [S. l.], v. 51, n. 1, p. 103–125, 2017. DOI: 10.37920/sasj.2017.51.1.6. Disponível em: https://www.journals.ac.za/index.php/sasj/article/view/5226. Acesso em: 3 apr. 2026.