Pietrasz, K., Sikora, D., Chodkiewicz, T., Ślęzak, M., & Woźniak, B. (2019). Keystone role of Eurasian beaver Castor fiber in creating the suitable habitat over the core breeding range for forest specialist species the three-toed woodpecker Picoides tridactylus. Baltic Forestry, 25(2), 223–227. https://doi.org/10.46490/vol25iss2pp223