Bremer B (2009). "A review of molecular phylogenetic studies of Rubiaceae". Annals of the Missouri Botanical Garden. 96: 4–26. doi:10.3417/2006197.
Bremer B, Eriksson E (2009). "Time tree of Rubiaceae: phylogeny and dating the family, subfamilies, and tribes". International Journal of Plant Sciences. 170: 766–793. doi:10.1086/599077.
jstor.org
Robbrecht E[in Spanish]; Manen J-F (2006). "The major evolutionary lineages of the coffee family (Rubiaceae, angiosperms). Combined analysis (nDNA and cpDNA) to infer the position of Coptosapelta and Luculia, and supertree construction based on rbcL, rps16, trnL-trnF and atpB-rbcL data. A new classification in two subfamilies, Cinchonoideae and Rubioideae". Systematic Geography of Plants. 76 (1): 85–146. JSTOR20649700.
Robbrecht E[in Spanish]; Manen J-F (2006). "The major evolutionary lineages of the coffee family (Rubiaceae, angiosperms). Combined analysis (nDNA and cpDNA) to infer the position of Coptosapelta and Luculia, and supertree construction based on rbcL, rps16, trnL-trnF and atpB-rbcL data. A new classification in two subfamilies, Cinchonoideae and Rubioideae". Systematic Geography of Plants. 76 (1): 85–146. JSTOR20649700.
