[1]
Christenhusz, M.J.M., Zhang, X.C. and Schneider, H. 2011. A linear sequence of extant families and genera of lycophytes and ferns. Phytotaxa. 19, 1 (Feb. 2011), 7–54. DOI:https://doi.org/10.11646/phytotaxa.19.1.2.