Taxon - Odkazy a literatura
Paleobiology Database [56270]
Paleobiology Database [https://paleobiodb.org/] [jako Cycadeoidea Buckland, 1828]
Datum citace: 13. prosinec 2015
The Interim Register of Marine and Nonmarine Genera [1023373]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [jako Cycadeoidea W. Buckland ex Lindley & W. Hutton, 1832]
Datum citace: 3. leden 2020
Novikoff A., Barabasz-Krasny B. (2015): System of Embryophytes [https://phytomorphology.org/personal-inf...], Plant Systematics: 23-63. Liga-Pres [jako Cycadeoidea W. Buckland ex Lindley et W. Hutton]Datum citace: 3. leden 2020