[@book{596,
 address = {Ithaca and London},
 author = {Channing, A.},
 publisher = {Cornell University Press},
 title = {Amphibians of Central and Southern Africa},
 year = {2001}
}
,@book{596,
 address = {Washington, D.C.},
 author = {Minter, L.R., Burger, M., Harrison, J.A., Braack, H.H., Bishop, P.J. and Knoepfer, D.},
 publisher = {SI/MAB Series No. 9},
 title = {Atlas and Red Data Book of the Frogs of South Africa, Lesotho and Swaziland},
 year = {2004}
}
,@electronic{596,
 address = {http://www.iucnredlist.org},
 author = {IUCN},
 title = {IUCN Red List of Threatened Species (ver. 2013.2)},
 year = {2013}
}
,@electronic{596,
 address = {http://research.amnh.org/herpetology/amphibia/index.html},
 author = {Frost, D.R.},
 publisher = {American Museum of Natural History},
 title = {Amphibian Species of the World: an Online Reference. Version 5.6 (9 January 2013). Electronic Database},
 year = {2013}
}
,@article{3070,
 author = {Channing, A. and Griffin, M.},
 journal = {Madoqua},
 pages = {101--116},
 title = {An annotated checklist of the frogs of Namibia},
 volume = {18},
 year = {1993}
}
,@inbook{3176,
 address = {Austin, Texas},
 author = {},
 booktitle = {African <i>Bufo</i>},
 editor = {Tandy, M. and Keith, R.},
 pages = {119--170},
 publisher = {University of Texas Press},
 title = {Evolution in the Genus <i>Bufo</i>},
 year = {1972}
}
,@article{13318,
 author = {Visser, J.},
 journal = {Journal of Herpetological Association of Africa},
 pages = {21--28},
 title = {Calling and spawning dates of the south-western Cape frogs},
 volume = {21},
 year = {1979}
}
,@article{54358,
 author = {Bates, M.F. and Haacke, W.D.},
 journal = {Navorsinge van die Nasionale Museum, Bloemfontein},
 pages = {101--158},
 title = {The frogs of Lesotho: diversity and distribution},
 volume = {19},
 year = {2003}
}
,@article{54636,
 author = {Poynton, J.C. and Broadley, D.G.},
 journal = {Annals of the Natal Museum},
 pages = {447--490},
 title = {Amphibia Zambesiaca. 4. Bufonidae},
 volume = {29},
 year = {1988}
}
,@article{54648,
 author = {Branch, W.R. and Braack, H.},
 journal = {Madoqua},
 number = {19},
 pages = {15--23},
 title = {A new toad from Paradise},
 year = {1995}
}
,@article{54648,
 author = {Bates, M.F.},
 journal = {African Journal of Herpetology},
 number = {46},
 pages = {13--29},
 title = {Herpetofauna of the nature reserves and national parks of the Free State province of South Africa},
 year = {1997}
}
,]