TY  - RPRT
TI  - Evolution of spite through indirect reciprocity.
AU  - Rufus A Johnstone
AU  - Redouan Bshary
PY  - 2004
DO  - 10.1098/rspb.2003.2581
UR  - https://pubmed.ncbi.nlm.nih.gov/15347514/
ID  - 15347514
ER  -