Benjamin Wimmer Bernhard Wöckl Michael Leitner Manfred Tscheligi Measuring the dynamics of user experience in short interaction sequences. 825-828 2010 NordiCHI http://doi.acm.org/10.1145/1868914.1869039 conf/nordichi/2010 db/conf/nordichi/nordichi2010.html#WimmerWLT10