Accepted By:
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Alejandro, G. D. & S. Liede-Schumann. 2003. The Philippine Rubiaceae Genera: Updated Synopsis in INTKEY Databases of the DELTA System. Blumea 48: 261-277.
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Turner, I. M. 2018. The importance of the plates in the Verhandelingen over de natuurlijke geschiedenis der Nederlandsche overzeesche bezittingen, Botanie for the nomenclature of South-East Asian plants. Taxon 67(3): 621–631.
General:
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Jansen, S., E. Robbrecht, H. Beeckman & E. Smets. 2000. Aluminum accumulation in Rubiaceae: an additional character for the delimitation of the subfamily Rubioideae?. IAWA J. 21(2): 197–212.
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