Plant Structure Ontology (PSO)— A Morphological and Anatomical Ontology of Flowering Plants

Ilic, K., Rhee, S. Y., Kellogg, E. A., & Stevens, P. F. (2007). Plant Structure Ontology (PSO)— A Morphological and Anatomical Ontology of Flowering Plants. In Anatomy Ontologies for Bioinformatics (pp. 27–42). Springer London. https://doi.org/10.1007/978-1-84628-885-2_2