[2] Ulf Tiede , Karl Heinz Hoehne. Investigation of medical 3D-rendering algorithms [J]. IEEE Computer Graphics & Applications, 1990, 10(3):41~65
[3] T. A. Foley. Computer Graphics: Principles and Practice [M]. RddisonWesley Publisher Company, 1990
[4] M. Levoy. Display of surface from volume data [J]. IEEE Computer Graphics and Application, 1988, 8(3):29~37
[5] J. Kajiya, B. Von Herzen. Ray tracing volume densities [J]. Computer Graphics, 1984, 18(3):165~173
[6] Lee Westover. Footprint evaluation for volume rendering [J]. Computer Graphics, 1990, 24(4):367~376
[7] Robert A. Drebin. Volume rendering [J]. Computer Graphics, 1988, 22(4):65~74
[8] Wu Bin. The Example and Technique of Programme with Open GL [M]. Beijing: The Press of People Post, 1999. 181~220 (in Chinese)