G. J. Wolski, K. Górecki, B. Białecka, M. Rajfur, P. Świsłowski, and W. R. Buck, “Morphology and micromorphology: A new look at the intraspecific variation of the Fontinalis antipyretica complex and its taxonomic implications”, Phytotaxa, vol. 782, no. 2, pp. 101–124, Oct. 2026.