Grégory Petit Aude Dufresne Vincent Lévesque Vincent Hayward Nicole Trudeau Refreshable tactile graphics applied to schoolbook illustrations for students with visual impairment. 89-96 2008 ASSETS http://doi.acm.org/10.1145/1414471.1414489 conf/assets/2008 db/conf/assets/assets2008.html#PetitDLHT08