%0 Journal Article %A Park, Eun-Young %A Blake, Ian %T Construction of extended Steiner systems for information retrieval. %J Revista matemática complutense %D 2008 %P 179-190 %V 21 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RMC_2008_2008_1_a6/ %G en %F RMC_2008_2008_1_a6