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Tesman 2009, pg. 692 Biggs 1985, pg. 89 Fyrirmynd greinarinnar var „Family of sets“ á ensku útgáfu Wikipedia. Sótt 12. nóvember 2022. Biggs, Norman L.
„Phylogeny of the Urticales based on three molecular data sets, with emphasis on relationships within Urticaceae“. American Journal of Botany. 87 (6):
M (Mars 1997). „Molecular phylogeny of the hominoids: inferences from multiple independent DNA sequence data sets“. Molecular Biology and Evolution. 14