PLIKUSAS, Aleksandras. Calibrated weights for the estimators of the ratio. Lietuvos matematikos rinkinys, [S. l.], v. 43, n. spec., p. 543–547, 2003. DOI: 10.15388/LMR.2003.32526. Disponível em: https://www.journals.vu.lt/LMR/article/view/32526.. Acesso em: 18 may. 2024.