@article{weko_59609_1,
   author	 = "Koji,Koyamada and Sakae,Uno and Akio,Dol and Tatsuo,Miyazawa",
   title	 = "Fast Volume Rendering by Polygonal Approximation",
   journal	 = "Journal of Information Processing ",
   year 	 = "1992",
   volume	 = "15",
   number	 = "4",
   pages	 = "535--544",
   month	 = "dec"
}