Herrera, I., Buchart, C., Borro, D., Jaume, S., Rondao Alface, P., & Macq, B. (2012). Adding Refined Isosurface Rendering and Shadow Mapping to vtkGPUVolumeRayCastMapper. The VTK Journal, January-December. https://hdl.handle.net/2078.5/254318 (Original work published 2012)