1. The genus Xanthophytum (Rubiaceae): taxonomy, phylogeny and biogeography;Axelius;Blumea,1990
2. Taxonomic studies in Euphrasia L. (Scrophulariaceae). A revised infrageneric classification, and a revision of the genus in Australia;Barker;Journal of the Adelaide Botanical Garden,1982
3. Conspectus of the genus Amyema Tieghem (Loranthaceae);Barlow;Blumea,1992