@article {14,
	title = {Subsampling Herbarium Collections to Assess Geographic Diversity Gradients: A Case-Study with endemic Orchidaceae and Rubiaceae in Cameroon},
	journal = {Biotropica},
	volume = {44},
	number = {1},
	year = {2012},
	pages = {44-52},
	keywords = {Orchids Africa},
	author = {Droissart, V. and Hardy, O. and Sonk{\'e}, B. and Dahdouh-Guebas, F. and Stevart, T.}
}
@article {19,
	title = {World Checklist of Rubiaceae},
	year = {2012},
	month = {1 Octobre 2012},
	publisher = {The Board of Trustees of the Royal Botanic Gardens, Kew},
	author = {Govaerts, R. and Ruhsam, M. and Andersson, L. and Robbrecht, E. and Bridson, D. and Davis, A. and Schanzer, I. and Sonk{\'e}, B.}
}
