PIIRAINEN, M.; NURMI, J. 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, [S. l.], v. 94, p. 100–108, 2018. Disponível em: https://journal.fi/msff/article/view/77426. Acesso em: 20 huhti. 2024.