Dippenaar-Schoeman, Anna S. (Anna Sophia), 1948-; Van den Berg, Almie; Lyle, Robin; Haddad, Charles R.; Foord, Stefan Hendrik; Lotz, Leon N.(AOSIS Open Journals, 2013-04-19)
Mitchell, R.G. (Richard Glen); Steenkamp, Emma Theodora; Coutinho, Teresa A.; Wingfield, Michael J.(Southern African Institute of Forestry (SAIF), 2011)