Functional Responses of Retaliatory Killing versus Recreational Sport Hunting of Leopards in South Africa Swanepoel, Lourens H. ; Somers, Michael J. ; Dalerum, Fredrik Abstract Publication: PLoS ONE Pub Date: April 2015 DOI: 10.1371/journal.pone.0125539 Bibcode: 2015PLoSO..1025539S