BioStor
 | The Genus Wittmackanthus (Rubiaceae) Julian A Steyermark and Joseph H Kirkbride (1975) Annals of the Missouri Botanical Garden 62: 504-509 |
 | Notes On Food Resources And Behavior Of The Family Coreidae (Hemiptera) In A Semi deciduous Tropical Forest J C Solomon and R C Froeschner (1981) Proceedings of The Entomological Society of Washington 83: 428-431 |
 | Studies in Neotropical Paleobotany. IV. The Eocene Communities of Panama Alan Graham (1985) Annals of the Missouri Botanical Garden 72: 504-534 |
 | Notes on the Rubiaceae of Peru C M Taylor (1992) Novon 2: 438-442 |
 | Tribes and Genera of the Cinchoneae Complex (Rubiaceae) Lennart Andersson (1995) Annals of the Missouri Botanical Garden 82: 409-427 |
 | Subfamilial and Tribal Relationships in the Rubiaceae Based on rbcL Sequence Data Birgitta Bremer, Katarina Andreasen and Daniel Olsson (1995) Annals of the Missouri Botanical Garden 82: 383-397 |
 | Chromosome Survey of the Rubiaceae Michael Kiehn (1995) Annals of the Missouri Botanical Garden 82: 398-408 |