@techreport{KratzReininghausHadwigeretal.2011, author = {Andrea Kratz and Jan Reininghaus and Markus Hadwiger and Ingrid Hotz}, title = {Adaptive Screen-Space Sampling for Volume Ray-Casting}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {11-04}, language = {eng}, year = {2011} }