%0 Journal Article %A Joachim Kunert %T Optimality of Block Designs with Variable Block Sizes and Random Block Effects. %J Metrika %D 1994 %P 71-81 %V 41 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1994__41_5_176499/ %F MET_1994__41_5_176499