Williams, G. C. (1997). Preliminary assessment of the phylogeny of Pennatulacea (Anthozoa: Octocorallia), with a reevaluation of Ediacaran frond-like fossils, and a synopsis of the history of evolutionary thought regarding the sea pens. Proceedings of the Sixth International Conference on Coelenterate Biology, 497-509
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Williams, G. C.
1997
Preliminary assessment of the phylogeny of Pennatulacea (Anthozoa: Octocorallia), with a reevaluation of Ediacaran frond-like fossils, and a synopsis of the history of evolutionary thought regarding the sea pens
Proceedings of the Sixth International Conference on Coelenterate Biology