Hanspeter Pfister William E. Lorensen Chandrajit L. Bajaj Gordon L. Kindlmann William J. Schroeder Lisa Sobierajski Avila Ken Martin Raghu Machiraju Jinho Lee The Transfer Function Bake-Off. 16-22 2001 21 IEEE Computer Graphics and Applications 3 http://www.computer.org/cga/cg2001/g3016abs.htm db/journals/cga/cga21.html#PfisterLBKSAMML01