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Åkesson, S., Hedenström, A., Bensch, S. and Irwin, D.E. 2002. Blowfly Trypocalliphora braueri (Diptera: Calliphoridae) larvae infestation in Willow Warblers Phylloscopus trochilus breeding in a hybrid zone. Ornis Svecica. 12, 1–2 (Apr. 2002), 83–88. DOI:https://doi.org/10.34080/os.v12.22840.