References
For Casasia
Mouly, A., K. Kainulainen, C. Persson, A.P. Davis, K.M. Wong, S.G. Razafimandimbison, and B. Bremer. 2014. Phylogenetic structure and clade circumscriptions in the Gardenieae complex (Rubiaceae). Taxon 63: 801-818. Google Scholar