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Giselher Grabenweger, Barbarajäckel, Hilde Hopp, Hartmut Balder, Anja Koch, Silkeschmolling¹, Pflanzenschutzamt Berlin. "Augmentation of Cameraria ohridella parasitoids by providing alternative host resources in spring." Nachrichtenbl. Deut. Pflanzenschutzd (2006)