Jens Gerken Mathias Heilig Hans-Christian Jetter Sebastian Rexhausen Mischa Demarmels Werner A. König Harald Reiterer Lessons learned from the design and evaluation of visual information-seeking systems. 49-66 2009 10 Int. J. on Digital Libraries 2-3 http://dx.doi.org/10.1007/s00799-009-0052-6 db/journals/jodl/jodl10.html#GerkenHJRDKR09