Template:Samain et al., 2008
- Samain, M.-S., Mathieu, G., Wanke, S., Neinhuis, C. & Goetghebeur, P. 2008. Verhuellia revisited - unravelling its intricate taxonomic history and a new subfamilial classification of Piperaceae. Taxon 57: 585–587. Full text (PDF).