Crouch, N.R., Klopper, R.R. and McNeill, J. 2014. Consideration of a recommendation to co-publish optional combinations in alternative classifications of the Ornithogaleae (Scilloideae, Asparagaceae). Phytotaxa. 178, 2 (Sep. 2014), 159–160. DOI:https://doi.org/10.11646/phytotaxa.178.2.9.