%0 Journal Article %A G. S. Rogers %T Rank conditions for estimability of covariances %J Applicationes Mathematicae %D 1983 %P 49-54 %V 18 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-18-1-49-54/ %R 10.4064/am-18-1-49-54 %G en %F 10_4064_am_18_1_49_54