%0 Journal Article %A C.H. Kapadia %A Kwan R. Lee %T Combined Unbiased Estimators Based on Q-Reduced Model. %J Metrika %D 1993 %P 137-147 %V 40 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1993__40_2_176455/ %F MET_1993__40_2_176455