Braje TJ, Rick TC, DeLong RL, Erlandson JM.  2011.  Resilience and reorganization: Archaeology and the historical ecology of California Channel Island sea mammals. Human Impacts on Seals, Sea Lions, and Sea Otters. 

Rick T.C, Vellanoweth R.L, Erlandson J.M.  2005.  Radiocarbon dating and the "old shell" problem: direct dating of artifacts and cultural chronologies in coastal and other aquatic regions. Journal of Archaeological Science. 32(11):1641-1648.