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Frey, Monika, Cornelia Stettner, Paul W. Paré, Eric A. Schmelz, James H. Tumlinson, ja Alfons Gierl. An Herbivore Elicitor Activates the Gene for Indole Emission in Maize. The National Academy of Sciences, 2000.

Frey, Monika, et al. An Herbivore Elicitor Activates the Gene for Indole Emission in Maize. The National Academy of Sciences, 2000.