References
For Campanulaceae
Crowl, A.A., E. Mavrodiev, G. Mansion, R. Haberle, A. Pistarino, G. Kamari, D. Phitos, T. Borsch, and N. Cellinese. 2014. Phylogeny of Campanuloideae (Campanulaceae) with emphasis on the utility of nuclear pentatricopeptide repeat (PPR) genes. PLOS One 9(4): e94199. Google Scholar
Eddie, W.M.M., T. Shulkina, J. Gaskin, R.C. Haberle, and R.K. Jansen. 2003. Phylogeny of Campanulaceae s. str. inferred from ITS sequences of nuclear ribosomal DNA. Ann. Missouri Bot. Gard. 90: 554-575. Google Scholar
Lammers. 2007. In Kadereit, J.W., and C. Jeffrey. 2007. The families and genera of vascular plants. VIII. Flowering plants – Eudicots – Asterales. Springer, Berlin. 636 pp. Google Scholar
Mansion, G., G. Parolly, A.A. Crowl, E. Mavrodiev, N. Cellinese, M. Oganesian, K. Fraunhofer, G. Kamari, D. Phitos, R. Haberle, G. Akaydin, N. Ikinci, T. Raus, and T. Borsch. 2012. How to handle speciose clades? Mass taxon-sampling as a strategy towards illuminating the natural history of Campanula (Campanuloideae. PLOS ONE 7: e50076. Google Scholar
Morin, N.R. 2020. Taxonomic changes in North American Campanuloideae (Campanulaceae). Phytoneuron 2020-49: 1-46. Published 15 July 2020. ISSN 2153 733X Google Scholar
Rosatti, T.J. 1986. The genera of Sphenocleaceae and Campanulaceae in the southeastern United States. J. Arnold Arb. 67: 1-64. Google Scholar
Shulkina, T.V., J.F. Gaskin, and W.M.M. Eddie. 2003. Morphological studies toward an improved classification of Campanulaceae s. str. Ann. Missouri Bot. Gard. 90: 576-591. Google Scholar
Yoo, K.-O., A.A. Crowl, K.-A. Kim, K.-S. Cheon, N. Cellinese. 2018. Origins of East Asian Campanuloideae (Campanulaceae) diversity. Molec. Phylogen. & Evol. 127: 468-474. Google Scholar