Davis AP, Chester M, Maurin O, Fay MF (2007). "Searching for the relatives of Coffea (Rubiaceae, Ixoroideae): the circumscription and phylogeny of Coffeeae based on plastid sequence data and morphology". American Journal of Botany. 94 (3): 313–329. doi:10.3732/ajb.94.3.313. PMID21636404.
Bremer B (2009). "A review of molecular phylogenetic studies of Rubiaceae". Annals of the Missouri Botanical Garden. 96: 4–26. doi:10.3417/2006197. S2CID53378010.
Bremer B, Eriksson E (2009). "Time tree of Rubiaceae: phylogeny and dating the family, subfamilies, and tribes". International Journal of Plant Sciences. 170 (6): 766–793. doi:10.1086/599077. S2CID49332892.
Davis AP, Chester M, Maurin O, Fay MF (2007). "Searching for the relatives of Coffea (Rubiaceae, Ixoroideae): the circumscription and phylogeny of Coffeeae based on plastid sequence data and morphology". American Journal of Botany. 94 (3): 313–329. doi:10.3732/ajb.94.3.313. PMID21636404.
Bremer B (2009). "A review of molecular phylogenetic studies of Rubiaceae". Annals of the Missouri Botanical Garden. 96: 4–26. doi:10.3417/2006197. S2CID53378010.
Bremer B, Eriksson E (2009). "Time tree of Rubiaceae: phylogeny and dating the family, subfamilies, and tribes". International Journal of Plant Sciences. 170 (6): 766–793. doi:10.1086/599077. S2CID49332892.