@techreport{KaehlerSimonHege2001, author = {Ralf K{\"a}hler and Mark Simon and Hans-Christian Hege}, title = {Fast Volume Rendering of Sparse High-Resolution Datasets Using Adaptive Mesh Refinement Hierarchies}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {01-25}, language = {eng}, year = {2001} }