Stjernberg, T., Carlsson, R., Hæggström, C.-A., Hæggström, E., & Sundberg, K. (2011). A new record of Arctic Bramble, Rubus arcticus, in the Åland Islands, SW Finland. Memoranda Societatis pro Fauna et Flora Fennica. Noudettu osoitteesta https://journal.fi/msff/article/view/3970