@article {2413,
	title = {Xenopus amieti sp. nov. (Anura: Pipidae) from the Cameroons, another case of tetraploidy.},
	journal = {Revue Suisse de Zoologie},
	volume = {87},
	year = {1980},
	pages = {919-926},
	author = {Kobel, H.R. and du Pasquier, L. and Gloor, H.}
}
@article {2426,
	title = {The biology and systematics of a new species of Xenopus (Anura: Pipidae) from the highlands of central Africa.},
	journal = {Journal of Zoology. London},
	volume = {188},
	year = {1979},
	pages = {69-102},
	author = {Tinsley, R.C. and Kobel, H.R. and Fischberg, M.}
}
@article {2421,
	title = {Xenopus longipes sp. nov., a new polyploid pipid from western Cameroon.},
	journal = {Revue Suisse de Zoologie},
	volume = {98},
	year = {1991},
	pages = {731-738},
	author = {Loumont, C. and Kobel, H.R.}
}
@inbook {1561,
	title = {The biology of Xenopus tadpoles},
	booktitle = {The Biology of Xenopus.},
	series = {Symposia of the Zoological Society of London 68.},
	year = {1996},
	pages = {195{\textendash}211},
	publisher = {Clarendon Press},
	organization = {Clarendon Press},
	address = {Oxford, U.K.},
	author = {Wassersug, R.J.},
	editor = {Tinsley, R.C. and Kobel, H.R.}
}
@article {1531,
	title = {The extant species},
	year = {1996},
	pages = {9-33 in Tinsley, R.C., and H.R. Kobel, eds.},
	publisher = {Clarendon Press},
	address = {Oxford, UK.},
	author = {Kobel, H.R. and Loumont, C. and Tinsley, R.C.}
}
@inbook {1554,
	title = {Geographical distribution and ecology.},
	booktitle = {Pp. 35{\textendash}59 in Tinsley, R.C., and H.R. Kobel, eds., The Biology of Xenopus.},
	series = {Symposia of the Zoological Society of London 68.},
	year = {1996},
	publisher = {Clarendon Press},
	organization = {Clarendon Press},
	address = {Oxford, U.K.},
	author = {Tinsley, R.C. and Loumont, C. and Kobel, H.R.}
}
