Yan Zhou Panagiotis Tsiamyrtzis Ioannis T. Pavlidis A Probabilistic Template Update Method for Tracking Facial Tissue in Thermal Infrared. 99-106 2008 AVSS https://doi.org/10.1109/AVSS.2008.8 https://doi.ieeecomputersociety.org/10.1109/AVSS.2008.8 conf/avss/2008 db/conf/avss/avss2008.html#ZhouTP08