diff --git a/books/bookvolbib.pamphlet b/books/bookvolbib.pamphlet
index bc8b940..0b3bed9 100644
--- a/books/bookvolbib.pamphlet
+++ b/books/bookvolbib.pamphlet
@@ -952,6 +952,9 @@ LCCN QA76.7.S54 v22:7 SIGPLAN Notices, vol 22, no 7 (July 1987)
 Shunro Watanabe and Morio Nagata, editors. ISSAC '90 Proceedings of the
 International Symposium on Symbolic and Algebraic Computation ACM Press,
 New York, NY, 10036, USA. 1990 ISBN 0-89791-401-5 LCCN QA76.95.I57 1990
+\bibitem[Yap00]{Yap00}
+Yap, Chee Keng ``Fundamental Problems of Algorithmic Algebra''
+Oxford University Press (2000) ISBN0-19-512516-9
 \bibitem[Zen92]{Zen92}
 Ch. Zenger. ``Gr{\"o}bnerbasen f{\"u}r Differentialformen und ihre
 Implementierung in AXIOM, Diplomarbeit, Universit{\"a}t Karlsruhe,
diff --git a/changelog b/changelog
index 1d60fed..848bdd9 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,5 @@
+20101120 tpd src/axiom-website/patches.html 20101120.01.tpd.patch
+20101120 tpd books/bookvolbib Chee Keng Yap [Yap00]
 20101119 tpd src/axiom-website/patches.html 20101119.01.tpd.patch
 20101119 tpd src/interp/vmlisp.lisp treeshake compiler
 20101119 tpd src/interp/postprop.lisp treeshake compiler
diff --git a/src/axiom-website/patches.html b/src/axiom-website/patches.html
index 8f57cae..b1975f3 100644
--- a/src/axiom-website/patches.html
+++ b/src/axiom-website/patches.html
@@ -3264,6 +3264,7 @@ books/bookvol9 treeshake compiler<br/>
 books/bookvol9 treeshake compiler<br/>
 <a href="patches/20101119.01.tpd.patch">20101119.01.tpd.patch</a>
 books/bookvol9 treeshake compiler<br/>
-
+<a href="patches/20101120.01.tpd.patch">20101120.01.tpd.patch</a>
+books/bookvolbib Chee Keng Yap [Yap00]<br/>
  </body>
 </html>