Spirostachys africana Sond.
| 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 |