PHYLOGENETIC TRENDS IN PHENOLIC METABOLISM OF MILKWEEDS ( ASCLEPIAS): EVIDENCE FOR ESCALATION.Published in:Evolution, 2009, v. 63, n. 3, p. 663, doi. 10.1111/j.1558-5646.2008.00573.xBy:Agrawal, Anurag A.;Salminen, Juha-Pekka;Fishbein, MarkPublication type:Article