Spatial distribution of galactic halos and their merger histories S. Gottlöber, M. Kerscher, A. V. Kravtsov, A. Faltenbacher, A. Klypin and V. Müller A&A, 387 3 (2002) 778-787 Published online: 17 May 2002 DOI: 10.1051/0004-6361:20020339