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Mathew M.J, Mathew J., Muhammed S.P.  2025.  Revisiting the taxonomy of the genus Diplocentrum (Orchidaceae) with the proposal for reinstatement of D. longifolium. Lilloa. 62(2):542.

Mathew J., Yohannan R., Salim P.M., George K.V..  2017.  Novelties in the family Acanthaceae from South Western Ghats, India. ANNALS OF PLANT SCIENCES. :1503.