Pedro Ferreira Pedro Sanches Kristina Höök Tove Jaensson License to chill!: how to empower users to cope with stress. 123-132 2008 NordiCHI http://doi.acm.org/10.1145/1463160.1463174 conf/nordichi/2008 db/conf/nordichi/nordichi2008.html#FerreiraSHJ08