A. Estes, M. T. Tinker, T. M. Williams, D. F. Doak. Killer Whale Predation on Sea Otters Linking Oceanic and Nearshore Ecosystems. Science Magazine.
Cannon, C. John. The Legacy of the Fur Trade. SeaOtters.com.
Delfino, Kim. Basic Facts About Sea Otters. Defenders of Wildlife.
Im, Sohyun. California Fur Rush Historical Essay. Foundsf Digital Archive.
Packard, Julie. Southern Sea Otters. Monterey Bay Aquarium.
Staff, SIMoN. Kelp Forests. Sanctuary Integrated Monitoring Network.
Steneck, R.S., Graham, M.H., Bourque, B.J., Corbett, D., Erlandson, J.M., Estes, J.A. and Tegner, M.J. “Kelp forest ecosystems: biodiversity, stability, resilience and future.” CambridgeCore.
University of California. Predators. What’s Killing California Sea Otters?