Piirainen, M., & Nurmi, J. (2018). Two new subspecies of Campanula rotundifolia L. described from North Europe and lectotypification of C. rotundifolia f. lapponica Witasek and f. pusilla Saelán. Memoranda Societatis Pro Fauna Et Flora Fennica, 94, 100–108. Retrieved from https://journal.fi/msff/article/view/77426