Irwin, Darren E.; Irwin, Jessica H.; Price, Trevor D. (2001). "Ring species as bridges between microevolution and speciation". Genetica. 112–113: 223–243. PMID11838767. doi:10.1023/A:1013319217703.
Ward, David (2011). "Population differentiation in a purported ring species, Acacia karroo (Mimosoideae)". Biological Journal of the Linnean Society104 (4): 748–755. doi:10.1111/j.1095-8312.2011.01757.x.
Jérôme Fuchs; et al. (2015). "The complex phylogeography of the Indo-Malayan Alophoixus bulbuls with the description of a putative new ring species complex". Molecular Ecology24 (21): 5460–5474. PMID26224534. doi:10.1111/mec.13337.
Naidoo, Theshnie; et al. (2016). "Partial support for the classical ring species hypothesis in the Chaerephon pumilus species complex (Chiroptera: Molossidae) from southeastern Africa and western Indian Ocean islands". Mammalia80 (6). doi:10.1515/mammalia-2015-0062.
Päckert, Martin; et al. (2005). "The great tit (Parus major) – a misclassified ring species". Biological Journal of the Linnean Society86 (2): 153–174. doi:10.1111/j.1095-8312.2005.00529.x.
Caire, William; Zimmerman, Earl G. (1975). "Chromosomal and Morphological Variation and Circular Overlap in the Deer Mouse, Peromyscus Maniculatus, in Texas and Oklahoma". Systematic Zoology24 (1): 89–95. doi:10.1093/sysbio/24.1.89.
Bensch, Staffan; et al. (2009). "Genetic, morphological, and feather isotope variation of migratory willow warblers show gradual divergence in a ring". Molecular Ecology18 (14): 3087–3096. PMID19457197. doi:10.1111/j.1365-294X.2009.04210.x.
Climo, F. M. (1978). "The Powelliphanta gilliesi - traversi - hochstetteri - rossiana - lignaria - superba ring species (Mollusca: Pulmonata)". New Zealand Journal of Zoology5: 289–294. doi:10.1080/03014223.1978.10428318.
Irwin, Darren E.; Irwin, Jessica H.; Price, Trevor D. (2001). "Ring species as bridges between microevolution and speciation". Genetica. 112–113: 223–243. PMID11838767. doi:10.1023/A:1013319217703.
Jérôme Fuchs; et al. (2015). "The complex phylogeography of the Indo-Malayan Alophoixus bulbuls with the description of a putative new ring species complex". Molecular Ecology24 (21): 5460–5474. PMID26224534. doi:10.1111/mec.13337.
Bensch, Staffan; et al. (2009). "Genetic, morphological, and feather isotope variation of migratory willow warblers show gradual divergence in a ring". Molecular Ecology18 (14): 3087–3096. PMID19457197. doi:10.1111/j.1365-294X.2009.04210.x.