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Ackerman MJ.Visible Human Project: From Data to Knowledge. In: Haux R, Kulikowski C, editors. Yearbook of Medical Informatics 2002: Medical Imaging Informatics. International Medical Informatics Association (IMIA). p. 115-7.
Yoo TS, Machiraju R, editors.From Transfer Functions to Level Sets: Advanced Topics in Volume Image Processing. Tutorial Notes for IEEE Visualization 2001; 2001 Oct 21-26; San Diego. 100 pages.
Yoo TS, Machiraju R, editors.Image Processing for Volume Graphics and Analysis. Tutorial Notes for IEEE Visualization 2000; 2000 Oct 8-13; Salt Lake City. 125 pages.
Ackerman MJ, Banvard RA.Imaging Outcomes from the National Library of Medicine's Visible Human Project. Comput Med Imaging Graph. 2000 May-Jun;24(3):125-6.