@inbook {53,
	title = {Les Rubiaceae end{\'e}miques du Cameroun et leur statut de conservation},
	booktitle = {Taxonomy and ecology of African plants, their conservation and uses. Proceedings du XVII{\`e}me Congr{\`e}s de l{\textquoteright}Aetfat},
	year = {2006},
	pages = {97-109},
	publisher = {Royal Botanic Garden Kew},
	organization = {Royal Botanic Garden Kew},
	address = {London},
	author = {Sonk{\'e}, B. and Nguembou, K.C. and Neuba, D.},
	editor = {Ghazanfar, S.A. and Beentje, H.J.}
}
@inbook {20,
	title = {Rubiaceae},
	booktitle = {Flora of West Tropical Africa, Second edition, Vol. II},
	year = {1963},
	month = {104},
	pages = {104-223},
	publisher = {Crown agents for oversea governments and administrations},
	organization = {Crown agents for oversea governments and administrations},
	type = {223},
	address = {London},
	author = {Hepper, F.N. and Keay, R.W.J.},
	editor = {Hutchinson, J. and Dalziel, J.M.}
}
@inbook {37,
	title = {Geography of African Rubiaceae with reference to glacial rain forest refuges},
	booktitle = {The biodiversity of African plants: Proceedings XIVth AETFAT congress},
	year = {1996},
	pages = {564-581},
	publisher = {Kluwer Academic Publishers},
	organization = {Kluwer Academic Publishers},
	address = {Netherlands},
	author = {Robbrecht, E.},
	editor = {van der Maesen, L.J.G. and van der Burgt, X.M. and van Medenbach de Rooy, J.M.}
}
