@article {4,
	title = {Dispersal of Stemmadenia donnell-smithii (Apocynaceae) by birds},
	journal = {Biotropica},
	year = {1977},
	pages = {9{\textendash}25},
	author = {McDiarmid, Roy W and Ricklefs, Robert E and Foster, Mercedes S}
}
@article {3,
	title = {Classification of the Apocynaceae. XXV. Echitoideae and supplement to the Plumeroideae.},
	journal = {Memoires du Museum National d{\textquoteright}Histoire Naturelle, Paris Ser. B. Botanique},
	volume = {1},
	year = {1950},
	pages = {1{\textendash}170},
	author = {Pichon, Marcel and others}
}
@article {2,
	title = {A revised classification of the Apocynaceae sl},
	journal = {The Botanical Review},
	volume = {66},
	year = {2000},
	pages = {1{\textendash}56},
	author = {Endress, Mary E and Bruyns, Peter V}
}
