Ehrendorfer, F.; Barfuss, M.H.J. 2014: Paraphyly and polyphyly in the worldwide tribe Rubieae (Rubiaceae): Challenges for generic delimitation. Annals of the Missouri Botanical Garden 100(1-2): 79–88.
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| Ehrendorfer, F.; Barfuss, M.H.J. 2014: Paraphyly and polyphyly in the worldwide tribe Rubieae (Rubiaceae): Challenges for generic delimitation. Annals of the Missouri Botanical Garden 100(1-2): 79–88. |