Alston, A. H. G. 1., Andersson-Kottö, I., Atkinson, L. R., Burgeff, H. E. N. 1., Du Buy, H. G., & Verdoorn, F. 1. (1938). Manual of pteridology. The Hague: Martinus Nijhoff.

Alston, Arthur Hugh Garfit 1902-1958, I. Andersson-Kottö, L. R. Atkinson, Hans Edmund Nicola 1883-1976 Burgeff, Herman Gerard Du Buy, and Frans 1906-1984 Verdoorn. Manual of Pteridology. The Hague: Martinus Nijhoff, 1938.

Alston, Arthur Hugh Garfit 1902-1958, et al. Manual of Pteridology. The Hague: Martinus Nijhoff, 1938.