%0 Journal Article %A Synówka-Bejenka, Ewa %A Zontek, Stefan %T On optimality of the orthogonal block design %J Discussiones Mathematicae. Probability and Statistics %D 2012 %P 59-68 %V 32 %N 1-2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMPS_2012_32_1-2_a4/ %G en %F DMPS_2012_32_1-2_a4