The following publications are possibly variants of this publication:
- Multidimensional Transfer Functions for Volume RenderingJoe Kniss, Gordon L. Kindlmann, Charles D. Hansen. In Charles D. Hansen, Christopher R. Johnson 0001, editors, The Visualization Handbook. pages 189-209, Academic Press / Elsevier, 2005. [doi]
- State of the Art in Transfer Functions for Direct Volume RenderingPatric Ljung, Jens H. Krüger, Eduard Gröller, Markus Hadwiger, Charles D. Hansen, Anders Ynnerman. cgf, 35(3):669-691, 2016. [doi]