Credits
Polyhedron is developed by Thomas Zumbrunn and released under the GNU General Public License version 3.
A large part of the application's code is derived from the drawing application DrawSWF (GPL 2) written by Helmut Heidegger, Max Lynch, and Tom Schindl.
Third party libraries in use are JDOM (Apache style license), iText (LGPL 2), JCalendar (LGPL 2), and JPedal (GPL 2). The icons are from Dean S. Jones' icon collection (BSD License).
The seminal paper describing the method is
Büchi S, Sensky T, Sharpe L, Timberlake N (1998) Graphic representation of illness: A novel method of measuring patient’s perceptions of the impact of illness. Psychother Psychosom 67:222-225
The PRISM™ cooperation, to which Polyhedron is not affiliated, is an association with the aim to spread, develop and implement the use of PRISM™ as an instrument for diagnosis, treatment and communication in all potential areas of application.