%0 Journal Article %A Mateva, Zlatka %T Constructing a Canonical form of a Matrix in Several Problems about Combinatorial Designs %J Serdica Journal of Computing %D 2008 %P 349-368 %V 2 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJC_2008_2_4_a3/ %G en %F SJC_2008_2_4_a3