Remove the entry referencing the DICOM standard.

Insert the following alphabetically by Identifier:

Identifier

Reference

LMIP Sato et. al., Local Maximum Intensity Projection: A new rendering method for vascular visualisation, Journal of Computer Assisted Tomography, Vol 22, No 6, 1998,  2005
http://citeseer.ist.psu.edu/31456.html
ENGEL K. Engel, et. al., Real-Time Volume Graphics, A. K. Peters.
http://www.real-time-volume-graphics.org/
HENYEY L. Henyey and J. Greenstein, Diffuse radiation in the galaxy, Astrophysics Journal, Vol 93, 1941.