BioStor
 | LVII.—Observations on the Structure of the Pollen Granule, considered principally with reference to its eligibility as a means of Classification Arthur Hill Hassall (1842) Annals And Magazine of Natural History 9: 544-573 |
 | The Polygalaceae in the southeastern United States N G Miller (1971) Journal of the Arnold Arboretum 52: 267-284 |
 | The taxonomy and phylogeny of the genus Polyura Billberg (Lepidoptera: Nymphalidae) Robert L Smiles (1982) Bulletin of the British Museum (Natural History) Entomology 44(3): 115-237 |
 | Preliminary Report on Herbarium Specimens Collected in South-Eastern Australia in 1992 A Wörz (1994) Stuttgarter Beiträge zur Naturkunde Serie A (Biologie) 516: 1-18 |