@book {4861,
	title = {The genera and species of orchidaceous plants},
	year = {1840},
	month = {///1830-1840},
	publisher = {Ridgways, Picadilly},
	organization = {Ridgways, Picadilly},
	address = {London},
	author = {Lindley, J.}
}
@article {4245,
	title = {On some new Brazilian plants allied to the natural order Burmanniaceae},
	journal = {Proc. Linn. Soc. London},
	volume = {1},
	year = {1840},
	pages = {60-63},
	author = {Miers, J.}
}
@book {3423,
	title = {Flora Boreali-Americana, Vol. 2},
	year = {1840},
	month = {1840///},
	pages = { - 48},
	author = {Hooker, W. J.}
}
@article {3397,
	title = {Voyria acuminata},
	journal = {The Journal of Botany},
	volume = {2},
	year = {1840},
	month = {1840///},
	pages = { - 46},
	author = {Bentham, G.}
}
@article {3086,
	title = {Beitr{\"a}ge zur Kenntniss der parasitischen Pflanzen},
	journal = {Ann. Wiener Mus. Naturgesch.},
	volume = {2},
	year = {1840},
	month = {1840///},
	pages = {15 - 60},
	author = {Unger, F.}
}
@inbook {2994,
	title = {Apteria orobanchoides},
	booktitle = {Icon. Pl.},
	volume = {3},
	year = {1840},
	month = {1840///},
	pages = {t. 254},
	publisher = {Longman, Orme, Brown, Green, and Longmans},
	organization = {Longman, Orme, Brown, Green, and Longmans},
	address = {London},
	author = {Hooker, W. J.}
}
@article {2759,
	title = {Observationes de Voyria},
	journal = {Tijdschr. Natuurk. Gesch. Physiol.},
	volume = {7},
	year = {1840},
	month = {1840///},
	pages = {129 - 139},
	author = {Splitgerber, F. L.}
}
