Media type: E-Article Title: Testing the optimal defence hypothesis for two indirect defences: extrafloral nectar and volatile organic compounds Contributor: Radhika, Venkatesan; Kost, Christian; Bartram, Stefan; Heil, Martin; Boland, Wilhelm imprint: Springer Science and Business Media LLC, 2008 Published in: Planta Language: English DOI: 10.1007/s00425-008-0749-6 ISSN: 0032-0935; 1432-2048 Origination: Footnote: