TeDUB: A System for Presenting and Exploring Technical Drawings for Blind People. - Helen Petrie; Christoph Schlieder; Paul Blenkhorn; Gareth Evans 001; Alasdair King; Anne-Marie O'Neill; George T. Ioannidis; Blaithin Gallagher; David Crombie; Rolf Mager; Maurizio Alafaci (ICCHP, 2002)