Bernhard Stöger Mario Batusic Klaus Miesenberger Philipp Haindl Supporting Blind Students in Navigation and Manipulation of Mathematical Expressions: Basic Requirements and Strategies. 1235-1242 2006 conf/icchp/2006 ICCHP http://dx.doi.org/10.1007/11788713_178 db/conf/icchp/icchp2006.html#StogerBMH06