diff --git a/books/bookvolbib.pamphlet b/books/bookvolbib.pamphlet
index 2e9fb61..0cd363a 100644
--- a/books/bookvolbib.pamphlet
+++ b/books/bookvolbib.pamphlet
@@ -89,6 +89,9 @@ July 1994, CODEN EKRKAR ISSN 0013-5658
 R. Brown and A. Tonks ``Calculations with simplicial and cubical groups
 in AXIOM'' Journal of Symbolic Computation 17(2) pp159-179 February 1994
 CODEN JSYCEH ISSN 0747-7171
+\bibitem[Buh05]{Buh05}
+Buhl, Soren L., ``Some Reflections on Integrating a Computer Algebra System
+in R'' \verb|www.math.auc.dk/~slb/kurser/software/RCompAlg.pdf|
 \bibitem[Bur91]{Bur91}
 W. H. Burge, ``Scratchpad and the Rogers-Ramanujan identities'' In 
 Watt [Wat91], pp189-190 ISBN 0-89791-437-6 LCCN QA76.95.I59 1991
diff --git a/changelog b/changelog
index 5449dce..f939891 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,5 @@
+20100511 tpd src/axiom-website/patches.html 20100511.04.tpd.patch
+20100511 tpd books/bookvolbib add Soren L. Buhl [Buh05]
 20100511 tpd src/axiom-website/patches.html 20100511.03.tpd.patch
 20100511 tpd books/ps/v104rootsfindingpackage.ps added
 20100511 tpd src/algebra/Makefile help and test files for RootsFindingPackage
diff --git a/src/axiom-website/patches.html b/src/axiom-website/patches.html
index 0cbdd3f..ad52779 100644
--- a/src/axiom-website/patches.html
+++ b/src/axiom-website/patches.html
@@ -2689,5 +2689,7 @@ books/bookvol10.4 add LinesOpPack<br/>
 books/bookvolbib add Assia Mahboubi [Mah05]<br/>
 <a href="patches/20100511.03.tpd.patch">20100511.03.tpd.patch</a>
 books/bookvol10.4 add RootsFindingPackage<br/>
+<a href="patches/20100511.04.tpd.patch">20100511.04.tpd.patch</a>
+books/bookvolbib add Soren L. Buhl [Buh05]<br/>
  </body>
 </html>