Dwa nowe podgatunki Gymnocalycium prochazkianum
Gymnocalycium prochazkianum subsp. simile Řepka
Gymnocalycium prochazkianum subsp. simplex Řepka
Radomir Řepka, Petr Kouteckí: Gymnocalycium mostii aggregate: Taxonomy in the northern part of its distribution area including newly described taxa. In: Bradleya. Band 31, 2013, S. 96–113.
oryginalny artykuł:
http://botanika.prf.jcu.cz/systematics/publikace/2013_Repka-Koutecky.pdf
