Gao, Q., Botanic Gardens Conservation International (BGCI) & IUCN SSC Global Tree Specialist Group: Hydrangea paniculataIUCN Red List of Threatened Species. Version 2020-1. 2019. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 24.3.2020. (englanniksi)
