TY - JOUR A1 - Willi, Yvonne A1 - van Buskirk, J. A1 - Fischer, Markus T1 - A threefold genetic allee effect : Population size affects cross-compatibility, inbreeding depression and drift load in the self-incompatible Ranunculus reptans Y1 - 2005 SN - 0016-6731 ER -