Leuenberger, B. E. 2001: The type specimen of Opuntia cardiosperma (Cactaceae), new synonyms and new records from Argentina and Paraguay. – Willdenowia 31: 171-179

Title	The type specimen of Opuntia cardiosperma (Cactaceae), new synonyms and new records from Argentina and Paraguay
Authorship	Leuenberger, B. E.
Date published	2001
Volume	31
In journal	Willdenowia
Pages	171-179
Uri	https://www.bgbm.org/sites/default/files/documents/Vol%2B31%2Bp%2B171-179.pdf