Rinus Plasmeijer Peter Achten Pieter W. M. Koopman An Introduction to iTasks: Defining Interactive Work Flows for the Web. 1-40 2007 CEFP http://dx.doi.org/10.1007/978-3-540-88059-2_1 conf/cefp/2007 db/conf/cefp/cefp2007.html#PlasmeijerAK07