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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. DOI10.1111/cla.12408. (anglicky)
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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. DOI10.1111/cla.12408. (anglicky)