BioStor
 | Brief diagnostic dharacters of undescribed Madeiran insects T V Wollaston (1858) Annals and Magazine of Natural History 1: 113-125 |
 | Notes on the Flora of Kung Ping Shan, Kwangtung F P Metcalf (1945) Journal of the Arnold Arboretum 26: 197-205 |
 | Leaf Architecture of the Chloranthaceae Carol A Todzia and Richard C Keating (1991) Annals of the Missouri Botanical Garden 78: 476-496 |