Jenkins, A.R.; van Zyl, A.J. (2005). "Conservation status and community structure of cliff-nesting raptors and ravens on the Cape Peninsula, South Africa". Ostrich. 76 (3–4): 175–184. doi:10.2989/00306520509485490. ISSN0030-6525. S2CID84239150.
Jenkins, A.R.; van Zyl, A.J. (2005). "Conservation status and community structure of cliff-nesting raptors and ravens on the Cape Peninsula, South Africa". Ostrich. 76 (3–4): 175–184. doi:10.2989/00306520509485490. ISSN0030-6525. S2CID84239150.
Jenkins, A.R.; van Zyl, A.J. (2005). "Conservation status and community structure of cliff-nesting raptors and ravens on the Cape Peninsula, South Africa". Ostrich. 76 (3–4): 175–184. doi:10.2989/00306520509485490. ISSN0030-6525. S2CID84239150.