Large-scale distribution and spectral properties of galaxies in the   Shapley Concentration
  We present the results of a redshift survey of both cluster and intercluster galaxies in the central part of the Shapley Concentration, the richest supercluster of clusters in the nearby Universe, consisting of ~2000 radial velocities.   We estimate the total overdensity in galaxies of the supercluster and its mass and we discuss the cosmological implications of these results.   Moreover, using a Principal Components Analysis technique, we study the influence of the cluster and supercluster dynamics on the galaxy spectral morphology. 
E.Zucca, S.Bardelli, A.Baldi, G.Zamorani, L.Moscardini, R.Scaramella