PLIKUSAS, Aleksandras; PETRIKAITĖ, Alina. Calibrated estimators of the ratio with multidimensional auxiliary information. Lietuvos matematikos rinkinys, [S. l.], v. 42, n. spec., p. 559–564, 2002. DOI: 10.15388/LMR.2002.33032. Disponível em: https://test.zurnalai.vu.lt/LMR/article/view/33032. Acesso em: 27 oct. 2025.