TY - JOUR A1 - Schiffers, Katja A1 - Schurr, Frank Martin A1 - Tielbörger, Katja A1 - Urbach, Carsten A1 - Moloney, Kirk A. A1 - Jeltsch, Florian T1 - Dealing with virtual aggregation : a new index for analysing heterogeneous point patterns Y1 - 2008 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/11325 UR - http://www3.interscience.wiley.com/journal/117966123/home SN - 0906-7590 ER -