@mastersthesis {49, title = {Revealing the secrets of African Annonaceae: Systematics, evolution and biogeography of the syncarpous genera Isolona and Monodora}, year = {2008}, pages = {1-296}, school = {D. Phil. Thesis, Wageningen University}, author = {Couvreur, T.L.P.} } @article {51, title = {Pollen morphology within the Monodora clade, a diverse group of five African Annonaceae genera}, journal = {Grana}, volume = {47}, number = {3}, year = {2008}, pages = {185-210}, author = {Couvreur, T.L.P. and Botermans, M. and van Heuven, B.J. and Van der Ham, R. W. J. M.} }