Kirchoff, Bruce K., Evelin Pfeifer, and Rolf Rutishauser. “Plant Structure Ontology: How Should We Label Plant Structures With Doubtful or Mixed Identities?”. Zootaxa 1950, no. 1 (December 5, 2008): 103–122. Accessed April 3, 2025. https://mapress.com/zt/article/view/zootaxa.1950.1.10.