Karban R, IT Baldwin, KJ Baxter, G Laue, and GW Felton. 2000. Communication between plants: induced resistance in wild tobacco plants following clipping of neighboring sagebrush. Oecologia. : Karban R, AA Agrawal, JS Thaler, and LS Adler. 1999. Induced plant responses and information content about risk of herbivory. Trends in Ecology and Evolution. 14:443-447 Karban R and IT Baldwin. 1997. Induced Responses to Herbivory. . University of Chicago Press: