Sastry, N S NarasimhaSin, Peter2012-05-072012-05-072001Journal of combitional theory,series-A,V94,P1-14http://hdl.handle.net/10263/3845enIncidence matricesP-ranksDesignsQuadricsSympletic groupOrthogonal groupRepresentationCodes associated with nondegenerate quadrices of a symplectic space of even orderArticle