@article {5224,
	title = {Studies in Annonaceae. XIII. The role of morphological characters in subsequent classifications of Annonaceae. A comparative survey},
	journal = {TaxonTaxon},
	volume = {39},
	number = {1},
	year = {1990},
	pages = {16-32},
	author = {Koek-Noorman, J. and Westra, L.Y. Th. and Maas, P.J.M.}
}
