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H. Åström ja C.-A. Hæggström, ”What happens with the tree rings when the bird-cherry (Prunus padus L.) is defoliated by the moth bird-cherry ermine (Yponomeuta evonymellus Linnæus, 1758)?”, Memoranda Societatis pro Fauna et Flora Fennica, vsk. 94, ss. 78–83, touko 2018.