Leakey, Roger; Shackleton, Sheona; Du Plessis, Pierre (2005). "Domestication potential of Marula (Sclerocarya birrea subsp caffra) in South Africa and Namibia: 1. Phenotypic variation in fruit traits". Agroforestry Systems. 64 (1): 25–35. Bibcode:2005AgrSy..64...25L. doi:10.1007/s10457-005-2419-z. S2CID21601141.
Engelter & Wehmeyer; Wehmeyer, A.S. (1970). "Fatty acid composition of oils of some edible seeds of wild plants". Journal of Agricultural and Food Chemistry. 18 (1): 25–26. doi:10.1021/jf60167a025. PMID5524461.
"Protected Trees"(PDF). Department of Water Affairs and Forestry, Republic of South Africa. 3 May 2013. Archived from the original(PDF) on 5 July 2010.
Leakey, Roger; Shackleton, Sheona; Du Plessis, Pierre (2005). "Domestication potential of Marula (Sclerocarya birrea subsp caffra) in South Africa and Namibia: 1. Phenotypic variation in fruit traits". Agroforestry Systems. 64 (1): 25–35. Bibcode:2005AgrSy..64...25L. doi:10.1007/s10457-005-2419-z. S2CID21601141.
Engelter & Wehmeyer; Wehmeyer, A.S. (1970). "Fatty acid composition of oils of some edible seeds of wild plants". Journal of Agricultural and Food Chemistry. 18 (1): 25–26. doi:10.1021/jf60167a025. PMID5524461.
Leakey, Roger; Shackleton, Sheona; Du Plessis, Pierre (2005). "Domestication potential of Marula (Sclerocarya birrea subsp caffra) in South Africa and Namibia: 1. Phenotypic variation in fruit traits". Agroforestry Systems. 64 (1): 25–35. Bibcode:2005AgrSy..64...25L. doi:10.1007/s10457-005-2419-z. S2CID21601141.
"Protected Trees"(PDF). Department of Water Affairs and Forestry, Republic of South Africa. 3 May 2013. Archived from the original(PDF) on 5 July 2010.