@article{ritter_diagnosen_1964,
	title = {Diagnosen von {Neuen} {Kakteen}},
	volume = {13},
	issn = {https://onlinelibrary.wiley.com/doi/10.2307/1217799},
	doi = {https://doi.org/10.2307/1217799},
	number = {4},
	journal = {Taxon},
	author = {Ritter, Friedrich},
	year = {1964},
	pages = {143--145},
}