PT Unknown AU Wußler, DS Sachsenheimer, K Rapp, BE Schwarz, T TI Development of a graphic and braille optimized plotter for the blind and visually impaired SE 16th International Conference on Computers Helping People with Special Needs, ICCHP 2018; Linz; Austria; 11 July 2018 through 13 July 2018: Ed.: K. Miesenberger PY 2018 BP 221 EP 225 VL 10897 DI 10.1007/978-3-319-94274-2_30 LA english ER