Nitecki, M. H.; Webby, B. D.; Spjeldnaes, N.; Zhen, Y-Y. (2004). Receptaculitids and algae. Pp. 336-347 In B. D. Webby, F. Paris, M. L. Droser, & I. G. Percival (Eds.), The Great Ordovician biodiversification event. (Critical moments and perspectives in Earth history and paleobiology). New York: Columbia University Press.
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Nitecki, M. H.; Webby, B. D.; Spjeldnaes, N.; Zhen, Y-Y.
2004
Receptaculitids and algae. Pp. 336-347 In B. D. Webby, F. Paris, M. L. Droser, & I. G. Percival (Eds.), The Great Ordovician biodiversification event. (Critical moments and perspectives in Earth history and paleobiology). New York: Columbia University Press.