Brouwer, K. 1993. The 1992 EEP annual report. International Zoo News 40 (7): 5-16, figs. 1-4.
Brouwer, K. 1992. The 1991 EEP annual report. International Zoo News 39 (6): 8-17.
Brouwer, K.; Smits, S.; Boer, L.de 1991. Black rhino EEP annual report. EEP Yearbook 1990: 116-117.
Brouwer, K.; Smits, S.; Boer, L.de 1991. Indian rhino EEP annual report. EEP Yearbook 1990: 118-120.






