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Egan, Gary F., John Johnson, Michael Farrell, Robin McAllen, Frank Zamarripa, Michael J. McKinley, Jack Lancaster, Derek Denton, and Peter T. Fox. Cortical, Thalamic, and Hypothalamic Responses to Cooling and Warming the Skin in Awake Humans: A Positron-emission Tomography Study. National Academy of Sciences, 2005.

Egan, Gary F., et al. Cortical, Thalamic, and Hypothalamic Responses to Cooling and Warming the Skin in Awake Humans: A Positron-emission Tomography Study. National Academy of Sciences, 2005.