@article{RMC_2008_2008_1_a6,
     author = {Park, Eun-Young  and  Blake, Ian},
     title = {Construction of extended {Steiner} systems for information retrieval.},
     journal = {Revista matem\'atica complutense},
     pages = {179-190},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMC_2008_2008_1_a6/}
}