TAYLOR, Thomas N. et al. Paleobotany. The Biology and Evolution of Fossil Plants. [s.l.]: Academic Press, 2009. Dostupné online. ISBN978-0-12-373972-8.
Liang Zhang, et al. Evolutionary relationships of the ancient fern lineage the adder's tongues (Ophioglossaceae) with description of Sahashia gen. nov. S. 380–393. Cladistics [online]. John Wiley & Sons, Inc., 17. leden 2020 [cit. 2020-10-20]. Svazek 36, čís. 4, s. 380–393. Dostupné online. ISSN1096-0031. doi:10.1111/cla.12408. (anglicky)
SCHNEIDER, Harald, et al. (The Pteridophyte Phylogeny Group). A community-derived classification for extant lycophytes and ferns. S. 563–603. Journal of Systematics and Evolution [online]. Institute of Botany, Chinese Academy of Sciences & John Wiley & Sons, Inc., 7. listopad 2016 [cit. 2020-10-20]. Svazek 54, čís. 6, s. 563–603. Dostupné online. Dostupné také na: [1]. ISSN1759-6831. doi:10.1111/jse.12229. (anglicky)
ZHANG, Liang; ZHANG, Li-Bing. Phylogeny, character evolution, and systematics of the fern family Ophioglossaceae based on Sanger sequence data, plastomes, and morphology. Molecular Phylogenetics and Evolution [online]. Elsevier Inc., 2022-08 [cit. 2022-06-03]. Roč. 173: 107512. Dostupné online. ISSN1055-7903. doi:10.1016/j.ympev.2022.107512. (anglicky)
SCHNEIDER, Harald, et al. (The Pteridophyte Phylogeny Group). A community-derived classification for extant lycophytes and ferns. S. 563–603. Journal of Systematics and Evolution [online]. Institute of Botany, Chinese Academy of Sciences & John Wiley & Sons, Inc., 7. listopad 2016 [cit. 2020-10-20]. Svazek 54, čís. 6, s. 563–603. Dostupné online. Dostupné také na: [1]. ISSN1759-6831. doi:10.1111/jse.12229. (anglicky)
ZHANG, Liang; ZHANG, Li-Bing. Phylogeny, character evolution, and systematics of the fern family Ophioglossaceae based on Sanger sequence data, plastomes, and morphology. Molecular Phylogenetics and Evolution [online]. Elsevier Inc., 2022-08 [cit. 2022-06-03]. Roč. 173: 107512. Dostupné online. ISSN1055-7903. doi:10.1016/j.ympev.2022.107512. (anglicky)
Liang Zhang, et al. Evolutionary relationships of the ancient fern lineage the adder's tongues (Ophioglossaceae) with description of Sahashia gen. nov. S. 380–393. Cladistics [online]. John Wiley & Sons, Inc., 17. leden 2020 [cit. 2020-10-20]. Svazek 36, čís. 4, s. 380–393. Dostupné online. ISSN1096-0031. doi:10.1111/cla.12408. (anglicky)
SCHNEIDER, Harald, et al. (The Pteridophyte Phylogeny Group). A community-derived classification for extant lycophytes and ferns. S. 563–603. Journal of Systematics and Evolution [online]. Institute of Botany, Chinese Academy of Sciences & John Wiley & Sons, Inc., 7. listopad 2016 [cit. 2020-10-20]. Svazek 54, čís. 6, s. 563–603. Dostupné online. Dostupné také na: [1]. ISSN1759-6831. doi:10.1111/jse.12229. (anglicky)
Liang Zhang, et al. Evolutionary relationships of the ancient fern lineage the adder's tongues (Ophioglossaceae) with description of Sahashia gen. nov. S. 380–393. Cladistics [online]. John Wiley & Sons, Inc., 17. leden 2020 [cit. 2020-10-20]. Svazek 36, čís. 4, s. 380–393. Dostupné online. ISSN1096-0031. doi:10.1111/cla.12408. (anglicky)
SCHNEIDER, Harald, et al. (The Pteridophyte Phylogeny Group). A community-derived classification for extant lycophytes and ferns. S. 563–603. Journal of Systematics and Evolution [online]. Institute of Botany, Chinese Academy of Sciences & John Wiley & Sons, Inc., 7. listopad 2016 [cit. 2020-10-20]. Svazek 54, čís. 6, s. 563–603. Dostupné online. Dostupné také na: [1]. ISSN1759-6831. doi:10.1111/jse.12229. (anglicky)
ZHANG, Liang; ZHANG, Li-Bing. Phylogeny, character evolution, and systematics of the fern family Ophioglossaceae based on Sanger sequence data, plastomes, and morphology. Molecular Phylogenetics and Evolution [online]. Elsevier Inc., 2022-08 [cit. 2022-06-03]. Roč. 173: 107512. Dostupné online. ISSN1055-7903. doi:10.1016/j.ympev.2022.107512. (anglicky)