Martina Joisten Limin Zeng Julie D. Woletz Anke M. Brock Mauro Avila Accessible Interaction for Visually Impaired People. 379-381 2015 MuC (Workshopband) https://dl.gi.de/handle/20.500.12116/8139 conf/mc/2015w db/conf/mc/mc2015w.html#JoistenZWBA15