Hallvard Trætteberg UI Design without a Task Modeling Language - Using BPMN and Diamodl for Task Modeling and Dialog Design. 110-117 2008 TAMODIA/HCSE http://dx.doi.org/10.1007/978-3-540-85992-5_9 conf/tamodia/2008 db/conf/tamodia/tamodia2008.html#Traetteberg08