@article {20,
	title = {Notocactus buiningii Buxbaum},
	journal = {Kakt. And. Sukk.},
	volume = {19},
	year = {1968},
	pages = {229-231},
	chapter = {229},
	author = {Buxbaum, F.}
}
@article {15,
	title = {Parodia allosiphon - eine wenig bekannte Parodia aus Uruguay},
	journal = {Kakt. And. Sukk. (Germany) },
	volume = {55},
	year = {2004},
	pages = {79-81},
	chapter = {79},
	author = {Hofacker, A.}
}
@article {7,
	title = {Nomenclatural note on the subgenera of Parodia (Cactaceae - Cactoideae)},
	journal = {Taxon},
	volume = {57},
	year = {2008},
	pages = {985-988},
	chapter = {985},
	abstract = {The nomenclatural problems involved with subgeneric names under Parodia are elucidated, and the nomenclature of all existing names is evaluated in detail. Subgeneric names under Notocactus are similarly covered in a second part. A third part consists of a list of published subgeneric names for the group arranged alphabetically by the epithet of the name of the species indicating the type.},
	keywords = {nomenclature, Notocactus, Parodia},
	author = {Eggli, U. and Machado, M. C. and Nyffeler, R.}
}
@article {2,
	title = {A new species of Parodia (Cactaceae, Notocacteae) from Rio Grande do Sul, Brasil},
	journal = {Novon},
	volume = {18},
	year = {2008},
	month = {22 May 2008},
	pages = {214-218},
	chapter = {214},
	keywords = {Brasil, Cactaceae, campos, IUCN Red List, Notocacteae, pampas, Parodia, Rio Grande do Sul},
	author = {Machado, M. C. and Nyffeler, R. and Eggli, U. and Larocca e Silva, J. F.}
}
