D. Edwards; Feehan, J. (1980). "Records of Cooksonia-type sporangia from late Wenlock strata in Ireland". Nature. 287 (5777): 41-42. Bibcode:1980Natur.287...41E. doi:10.1038/287041a0.
Laura Wegener Parfrey; Daniel J.G. Lahr; Andrew H. Knoll; Laura A. Katz (16 Ağustos 2011), "Estimating the timing of early eukaryotic diversification with multigene molecular clocks", Proceedings of the National Academy of Sciences of the United States of America, 108 (33), Bibcode:2011PNAS..10813624P, doi:10.1073/PNAS.1110633108, PMC3158185 $2, PMID21810989, WikidataQ24614721
D. Edwards; Feehan, J. (1980). "Records of Cooksonia-type sporangia from late Wenlock strata in Ireland". Nature. 287 (5777): 41-42. Bibcode:1980Natur.287...41E. doi:10.1038/287041a0.
Laura Wegener Parfrey; Daniel J.G. Lahr; Andrew H. Knoll; Laura A. Katz (16 Ağustos 2011), "Estimating the timing of early eukaryotic diversification with multigene molecular clocks", Proceedings of the National Academy of Sciences of the United States of America, 108 (33), Bibcode:2011PNAS..10813624P, doi:10.1073/PNAS.1110633108, PMC3158185 $2, PMID21810989, WikidataQ24614721
Laura Wegener Parfrey; Daniel J.G. Lahr; Andrew H. Knoll; Laura A. Katz (16 Ağustos 2011), "Estimating the timing of early eukaryotic diversification with multigene molecular clocks", Proceedings of the National Academy of Sciences of the United States of America, 108 (33), Bibcode:2011PNAS..10813624P, doi:10.1073/PNAS.1110633108, PMC3158185 $2, PMID21810989, WikidataQ24614721
Laura Wegener Parfrey; Daniel J.G. Lahr; Andrew H. Knoll; Laura A. Katz (16 Ağustos 2011), "Estimating the timing of early eukaryotic diversification with multigene molecular clocks", Proceedings of the National Academy of Sciences of the United States of America, 108 (33), Bibcode:2011PNAS..10813624P, doi:10.1073/PNAS.1110633108, PMC3158185 $2, PMID21810989, WikidataQ24614721
