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 |
 | A taxonomic revision of the American species of Agarista (Ericaceae) W S Judd (1984) Journal of the Arnold Arboretum 65: 255-342 |