Added another document about optimizations and references in README.

diff --git a/README b/README
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+++ b/README
@@ -2,21 +2,34 @@ libae - Adaptive entropy encoding library
 ----------------------------------------------------------------------------------------------
 Copyright 2012 
 
-Mathis Rosenhauer, Moritz Hanke, Jörg Behrens             Luis Kornblueh
+Mathis Rosenhauer, Moritz Hanke, Joerg Behrens           Luis Kornblueh
 
-Deutsches Klimarechenzentrum GmbH                         Max Planck Institute for Meteorology 
-Bundesstr. 45a                                            Bundesstr. 53
-D-20146 Hamburg                                           D-20146 Hamburg               
-Germany                                                   Germany
+Deutsches Klimarechenzentrum GmbH                        Max-Planck-Institut fuer Meteorologie 
+Bundesstr. 45a                                           Bundesstr. 53
+D-20146 Hamburg                                          D-20146 Hamburg               
+Germany                                                  Germany
 ----------------------------------------------------------------------------------------------
 
 The implementation is based on:
 
-Lossless Data Compression. Recommendation for Space Data System
-Standards, CCSDS 121.0-B-2. Blue Book. Issue 2. Washington, D.C.:
-CCSDS, May 2012.
+Consultative Committee for Space Data Systems. Lossless Data Compression. 
+Recommendation for Space Data System Standards, CCSDS 121.0-B-2. Blue Book. Issue 2. 
+Washington, D.C.: CCSDS, May 2012.
 
-A copy is made available, with some additional documents in the docs directory.
+http://public.ccsds.org/publications/archive/121x0b2.pdf
+
+Consultative Committee for Space Data Systems. Lossless Data Compression. 
+Recommendation for Space Data System Standards, CCSDS 120.0-G-2. Green Book. Issue 2. 
+Washington, D.C.: CCSDS, December 2006.
+
+http://public.ccsds.org/publications/archive/120x0g2.pdf
+
+Aaron B. Kiely. Selecting the golomb parameter in rice coding. 
+IPN Progress Report, 42-159:18+, November 2004.
+
+http://ipnpr.jpl.nasa.gov/progress_report/42-159/159E.pdf
+
+Copies are made available with some additional documents in the docs directory.
 Additional, in doc/license.txt a clarification on eventually applying intellectual
 property rights is given.
 

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