TY - T1 - Cooperative behaviour and cooperative breeding: What constitutes an explanation? SN - / UR - http://dx.doi.org/10.1016/j.beproc.2006.11.010; http://hdl.handle.net/1975/6002 T3 - A1 - Kokko, Hanna A2 - PB - Y1 - 2007 LA - AB - ... VO - IS - SP - OP - KW - cooperative breeding; group augmentation; multi-level selection; life history N1 - PP - ER -