Spatial Distribution of Very Rich Abell Clusters: Results and Projects Fetisova, T. S. ; Kuznetsov, D. Yu. ; Lipovetsky, V. A. ; Olowin, R. P. ; Starobinsky, A. A. Abstract Publication: Observational Cosmology Pub Date: January 1993 Bibcode: 1993ASPC...51..102F