Holttum, R.E. 1973: Studies in the family Thelypteridaceae V. The genus Pneumatopteris Nakai. Blumea 21: 293–325.
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| Holttum, R.E. 1973: Studies in the family Thelypteridaceae V. The genus Pneumatopteris Nakai. Blumea 21: 293–325. |