David M. Reed Roni Yagel Asish Law Po-Wen Shin Naeem Shareef Hardware Assisted Volume Rendering of Unstructured Grids by Incremental Slicing. 55- 1996 VVS http://portal.acm.org/citation.cfm?id=236226.236233 db/conf/vvs/vvs96.html#ReedYLSS96