Viewing facial expressions of pain engages cortical areas involved in the direct experience of pain. - Matthew M. Botvinick; Amishi P. Jha; Lauren M. Bylsma; Sara A. Fabian; Patricia E. Solomon; Kenneth M. Prkachin (NeuroImage, 2005)

The painful face - Pain expression recognition using active appearance models. - Ahmed Bilal Ashraf; Simon Lucey; Jeffrey F. Cohn; Tsuhan Chen; Zara Ambadar; Kenneth M. Prkachin; Patricia E. Solomon (Image Vis. Comput., 2009)

Painful data: The UNBC-McMaster shoulder pain expression archive database. - Patrick Lucey; Jeffrey F. Cohn; Kenneth M. Prkachin; Patricia E. Solomon; Iain A. Matthews (FG, 2011)

Painful monitoring: Automatic pain monitoring using the UNBC-McMaster shoulder pain expression archive database. - Patrick Lucey; Jeffrey F. Cohn; Kenneth M. Prkachin; Patricia E. Solomon; Sien W. Chew; Iain A. Matthews (Image Vis. Comput., 2012)