Palmer, Jeffrey (2004), "The Plant Tree of Life: an Overview and Some Points of View", American Journal of Botany, 91 (10): 1437–45, doi:10.3732/ajb.91.10.1437, PMID21652302
Hardeep S. Rai; Sean W. Graham (2010). "Utility of a large, multigene plastid data set in inferring higher-order relationships in ferns and relatives (Monilophytes)". American Journal of Botany. 97 (9): 1444–1456. doi:10.3732/ajb.0900305. PMID21616899.
Rothwell, G. W. & Nixon, K. C. (2006). "How does the inclusion of fossil data change our conclusions about the phylogenetic history of euphyllophytes". International Journal of Plant Sciences. 167 (3): 737–749. doi:10.1086/503298. S2CID86172890.
Palmer, Jeffrey (2004), "The Plant Tree of Life: an Overview and Some Points of View", American Journal of Botany, 91 (10): 1437–45, doi:10.3732/ajb.91.10.1437, PMID21652302
Hardeep S. Rai; Sean W. Graham (2010). "Utility of a large, multigene plastid data set in inferring higher-order relationships in ferns and relatives (Monilophytes)". American Journal of Botany. 97 (9): 1444–1456. doi:10.3732/ajb.0900305. PMID21616899.
Rothwell, G. W. & Nixon, K. C. (2006). "How does the inclusion of fossil data change our conclusions about the phylogenetic history of euphyllophytes". International Journal of Plant Sciences. 167 (3): 737–749. doi:10.1086/503298. S2CID86172890.