Patrick Lucey Jessica Howlett Jeffrey F. Cohn Simon Lucey Sridha Sridharan Zara Ambadar Improving pain recognition through better utilisation of temporal information. 167-172 2008 AVSP https://www.isca-archive.org/avsp_2008/lucey08b_avsp.html conf/avsp/2008 db/conf/avsp/avsp2008.html#LuceyHCLSA08