L. Zhang, and B. Johansson. IFIP international conference on research and practical issues of enterprise information systems CONFENIS 2009. Gyor, Hungary, (2009)
E. Bernroider, F. Sudzina, and A. Pucihar. The 22nd Bled eConference eEnablement: Facilitating an Open, Effective and Representative eSociety. Bled, Slovenia, page 369-381. (2009)