@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.}
}
@article {4,
	title = {Two New Species of <i>Psychotria</i> (Rubiaceae) from Western Cameroon},
	journal = {Kew Bulletin},
	volume = {57},
	number = {2},
	year = {2002},
	pages = {389-395},
	chapter = {389},
	author = {Cheek, M. and Bridson, D.}
}
