Boissier, E. 1884: Flora Orientalis. 5. –Genevae et Basileae.
Clapham, A. R., Tutin, T. G. & Warburg, E. F. 1962: Flora of the British Isles. Cambridge University Press.
Coste, H. 1901: Flore Descriptive et illustrée de la france de la corse et des contrées limitrophes. III. Librairie Scientifique et Technique.
Henderson, D. M. 1965: Filicales in P. H. Davis (ed.) Flora of Turkey and the east Agean Islands. vol. 1: 40.
Iljin, M. M. 1934: Archegoniatae and Embryophyta in V. L. Komarov (ed.), Flora of the U.S.S.R. v. 1. Leningerad (translated from Russian by Israel program for scientific translation, Jeursalem 1968).
Jalas, J. & Suominen, J. 1972: Atlas Florae Europaeae (Pteridophyta) vol.1. Helsinki.
Maire, D. R. 1952: Flore de L’Afrique du Nord. vol. 1. Paris.
Parsa, A. 1978: Flora of Iran. vol. 1. Ministry of Science and Higher Education of Iran.
Paul, A. M., 1987: the status of Ophioglussum azoricum in the British Islans, -Fern gazette, 13(3).
Valentine, D. H. 1964: Ophioglossaceae in T. G. Tutin et al.(eds.) Flora Europaea. vol. 1: 8. – Cambridge University Press.
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