Smith, J.J., Nova Guinea 8, 1 (1909) 44, t. 16, fig. 50
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Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 85, fig. 311, as Mediocalcar abbreviatum Schltr.
Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 84, fig. 310, as Mediocalcar angustifolium Schltr.
Schuiteman, A., Orchid Monogr. 8 (1997) 65, fig. 24, 25, pl. 3d
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