1. Spory Paporotnikoobraznykh i pyl'tsa Golosemennykh i Odnodol'nykh Rastenii Flory Yevropeyskoy Chasti SSSR;Bobrov,1983
2. Two new taxa of Ophioglossum from tropical Africa;Burrows;Bothalia,1999
3. A linear sequence of extant families and genera of lycophytes and ferns;Christenhusz;Phytotaxa,2011
4. A monograph of the Ophioglossaceae;Clausen;Mem. Torrey Bot. Club,1938
5. Checklist of vascular plants of the Czech Republic;Danihelka;Preslia,2012