BioStor
 | An Ordinal Classification for the Families of Flowering Plants (1998) Annals of the Missouri Botanical Garden 85: 531-553 |
 | Phylogeny of Basal Eudicots Based on Three Molecular Data Sets: atpB, rbcL, and 18s Nuclear Ribosomal DNA Sequences Sara B Hoot, Susana Magallon and Peter R Crane (1999) Annals of the Missouri Botanical Garden 86: 1-32 |