B. Zwattendorfer, T. Zefferer, and K. Stranacher. WEBIST (Revised Selected Papers), volume 226 of Lecture Notes in Business Information Processing, page 128-144. Springer, (2014)
T. Zwahr, P. Rossel, and M. Finger. DG.O, volume 89 of ACM International Conference Proceeding Series, page 53-62. Digital Government Research Center, (2005)