Sex Work during the 2010 FIFA World Cup: Results from a Three-Wave Cross-Sectional Survey Delva, Wim ; Richter, Marlise ; De Koker, Petra ; Chersich, Matthew ; Temmerman, Marleen Abstract Publication: PLoS ONE Pub Date: December 2011 DOI: 10.1371/journal.pone.0028363 Bibcode: 2011PLoSO...628363D