1. Apps, P. , Branch, B. , Carruthers, V. , Leroy, A. , Musgrave, M. , Newman, K. , et al. (2001) Fauna und Flora im südlichen Afrika. Ein Handbuch für die Tierund Pflanzenwelt der Region. 2001.
2. Massonia gypsicola (Asparagaceae, Scilloideae), a new species from the Knersvlakte in South Africa;Phytotaxa,2017
3. Clarification of Massonia echinata and some other frequently misunderstood Massonia species (Asparagaceae, Scilloideae), with the description of M. pseudoechinata and M. roggeveldensis;Phytotaxa,2015
4. Bates, M.F. , Branch, W.R. , Bauer, A.M. , Burger, M. , Marais, J. , Alexander, G.J. , and Villiers, M.S. De (2014) Atlas and Red List of the reptiles of South Africa, Lesotho and Swaziland.
5. Rodent pollination in Protea nana;South African J. Bot,2009