Yŏng-ja O

• A study of epidermal patterns of the leaf blades of Korean sedges
• Hanʼguk ŭi pʻungsŭp
• Systematic and biogeography of eastern Asian plants
• Taxonomic study on genus Taraxacum in South Korea
• Taxonomic study on the genus Commelina in Korea
• Taxonomic study on yellow flowered wild Chrysanthemum in Korea
• The intermediate plant between that taxa of Dianthus chinensis and Dianthus superbus