Åström, Helena, and Carl-Adam 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 940 (May 8, 2018): 78-83. Accessed October 18, 2019. https://journal.fi/msff/article/view/76257.