<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Hearst, M</hi> <hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">arti.</hi> 1999. “User Interfaces and Visualization” In Baeza-Yates, R. and Robeiro-Meto, B. (ed), <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Modern Information Retrieval</hi>, Addison Wesley Longman Publishing Co, Chapter 10.