BioStor
 | A monographic study of the West Indian species of Phyllanthus G L Webster (1957) Journal of the Arnold Arboretum 38: 51-80 |
 | A monographic study of the West Indian species of Phyllanthus G L Webster (1958) Journal of the Arnold Arboretum 39: 111-212 |
 | Synopsis of the Genera and Suprageneric Taxa of Euphorbiaceae Grady L Webster (1994) Annals of the Missouri Botanical Garden 81: 33-144 |