BioStor
 | An Analysis of the Flora of Southern Africa: Its Characteristics, Relationships, and Orgins Peter Goldblati (1978) Annals of the Missouri Botanical Garden 65: 369-436 |
 | Synopsis of the Genera and Suprageneric Taxa of Euphorbiaceae Grady L Webster (1994) Annals of the Missouri Botanical Garden 81: 33-144 |
 | Further Studies on Phorbol Ester Bioactivity in the Euphorbiaceae John A Beutler, Ada Belinda Alvarado Lindner and Thomas G Mccloud (1996) Annals of the Missouri Botanical Garden 83: 530-533 |