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Lloyd-Smith, James O., Denise J. Greig, Sharon Hietala, George S. Ghneim, Lauren Palmer, Judy St Leger, Bryan T. Grenfell, a Frances MD Gulland. Cyclical Changes in Seroprevalence of Leptospirosis in California Sea Lions: Endemic and Epidemic Disease in One Host Species? BioMed Central, 2007.

Lloyd-Smith, James O., et al. Cyclical Changes in Seroprevalence of Leptospirosis in California Sea Lions: Endemic and Epidemic Disease in One Host Species? BioMed Central, 2007.