S. Jessen, L. Lehmann, W. Bujnoch: Cryptogramma bithynica Spec. Nov. (Pteridaceae, Pteridophyta) - A new fern species from Northwestern Anatolia / Turkey. In: FERN GAZ., Volume 19, Issue 2, 2012, S. 47–54. PDF.
ars-grin.gov
npgsweb.ars-grin.gov
Cryptogramma im Germplasm Resources Information Network (GRIN), USDA, ARS, National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Abgerufen am 26. Februar 2019.