David S. Ebert Markus H. Gross Bernd Hamann IEEE Visualization 1999, 24-29 October 1999, San Francisco, CA, USA, Proceedings. IEEE Visualization IEEE Computer Society and ACM 1999 0-7803-5897-X http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6578 db/conf/visualization/visualization1999.html