International Code of Nomenclature for Cultivated Plants, 8th edition [1]Archivované 2011-08-13 na Wayback Machine najmä 2.1, 2.2
International Code of Nomenclature for Cultivated Plants, 8th edition [2]Archivované 2011-08-13 na Wayback Machine 2.2 Note 4
International Code of Nomenclature for Cultivated Plants, 8th edition [4]Archivované 2011-08-13 na Wayback Machine 2.2 (Poznámka: Definícia 2.23 zahŕňa aj hybridné sorty (hoci by sa pri prvom prečítaní mohol zdať opak) -porov. 2.16)
International Code of Nomenclature for Cultivated Plants, 8th edition [5]Archivované 2011-08-13 na Wayback Machine 3.3 Note 1 (ale porov. 2.2 Note 2)
International Code of Nomenclature for Cultivated Plants, 8th edition [6]Archivované 2011-08-13 na Wayback Machine 2.2 Note 3
International Code of Nomenclature for Cultivated Plants, 8th edition [7]Archivované 2011-08-13 na Wayback Machine 2.3
varieta. In: HAVRÁNEK, Bohuslav, ed. a kol. Slovník spisovného jazyka českého. Praha: Academia, 1989. dostupné online
iapt-taxon.org
Jirásek, V. Evolution of the Proposals of Taxonomical Categories for the Classification of Cultivated Plants. In: Taxon, Vol. 10, No. 2, Feb., 1961 [3], pp. 34-45, S. 40
International Code of Nomenclature for algae, fungi, and plants (Melbourne Code) [10] 28.1 Note 3
International Code of Nomenclature for algae, fungi, and plants (Melbourne Code) [11] 4.2
mendelu.cz
is.mendelu.cz
Šlechtění okrasných rostlin [online]. is.mendelu.cz, [cit. 2017-11-29]. Dostupné online.
Ochsmann, J. Current Problems in Nomenclature and Taxonomy of Cultivated Plants [9]Archivované 2017-12-01 na Wayback Machine S. 55,56
upov.int
International Code of Nomenclature for Cultivated Plants, 8th edition. dostupné online (Poznámka: Rôzne miesta v hlavnom texte a pozri aj napr. str. 143, kde sa výslovne rozlišuje medzi "skupina" a "Skupina")
web.archive.org
International Code of Nomenclature for Cultivated Plants, 8th edition [1]Archivované 2011-08-13 na Wayback Machine najmä 2.1, 2.2
International Code of Nomenclature for Cultivated Plants, 8th edition [2]Archivované 2011-08-13 na Wayback Machine 2.2 Note 4
International Code of Nomenclature for Cultivated Plants, 8th edition [4]Archivované 2011-08-13 na Wayback Machine 2.2 (Poznámka: Definícia 2.23 zahŕňa aj hybridné sorty (hoci by sa pri prvom prečítaní mohol zdať opak) -porov. 2.16)
International Code of Nomenclature for Cultivated Plants, 8th edition [5]Archivované 2011-08-13 na Wayback Machine 3.3 Note 1 (ale porov. 2.2 Note 2)
International Code of Nomenclature for Cultivated Plants, 8th edition [6]Archivované 2011-08-13 na Wayback Machine 2.2 Note 3