%0 Journal Article %A Prášková, Zuzana %T On Hájek's conjecture in stratified sampling %J Kybernetika %D 1995 %P 303-314 %V 31 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1995__31_3_a8/ %G en %F KYB_1995__31_3_a8