Index filicum,sive, Enumeratio omnium generum specierumque filicum et Hydropteridum ab anno 1753 ad finem anni 1905 descriptorium : adjectis synonymis principalibus, area geographica, etc - Christensen, Carl, 1872 -1942 (H. Hagerup, 1906)

Malayan ferns. Handbook to the determination of the ferns of The Malayan islands (incl. those of the Malay Peninsula, the Philippines and New Guinea) - Alderwerelt van Rosenburgh, C. R. W. K. van (Cornelis Rugier Willem Karel), 1863 -1936 (Landsdrukkerij, 1908)