BioStor
 | The Bases of Angiosperm Phylogeny: Palynology James W Walker and James A Doyle (1975) Annals of the Missouri Botanical Garden 62: 664-723 |
 | Notes on the biology of Australian seagrasses J Kuo (1983) Proceedings of The Linnean Society of New South Wales 106: 225-245 |
 | The Zannicheliaceae in the southeastern United States R R Haynes and L B Holm-Nielsen (1987) Journal of the Arnold Arboretum 68: 259-268 |
 | An Ordinal Classification for the Families of Flowering Plants (1998) Annals of the Missouri Botanical Garden 85: 531-553 |