diff --git a/books/bookvolbib.pamphlet b/books/bookvolbib.pamphlet
index 2b24ac7..602047a 100644
--- a/books/bookvolbib.pamphlet
+++ b/books/bookvolbib.pamphlet
@@ -3201,5 +3201,29 @@ Greve, David A.; McClurg, Jedidiah R.\\
in Lecture Notes in Computer Science, Springer ISBN 978-3-540-85520-0
(2006) pp102-113
+\subsection{Numeric Tests} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\bibitem[Lef\'evre 06]{Lef06} Lef\'evre, Vincent; Stehl\'e, Damien;
+Zimmermann, Paul\\
+``Worst Cases for the Exponential Function
+in the IEEE-754r decimal64 Format''\\
+in Lecture Notes in Computer Science, Springer ISBN 978-3-540-85520-0
+(2006) pp114-125
+
+\begin{adjustwidth}{2.5em}{0pt}
+We searched for the worst cases for correct rounding of the
+exponential function in the IEEE 754r decimal64 format, and computed
+all the bad cases whose distance from a breakpoint (for all rounding
+modes) is less than $10^{-15}$ ulp, and we give the worst ones. In
+particular, the worst case for
+$\vert{}x\vert{} \ge 3 x 10^{-11}$ is
+\[
+exp(9.407822313572878x10^{-2} = 1.09864568206633850000000000000000278\ldots
+\]
+This work can be extended to other elementary functions in the decimal64
+format and allows the design of reasonably fast routines that will
+evaluate these functions with correct rounding, at least in some situations.
+\end{adjustwidth}
+
\end{thebibliography}
\end{document}
diff --git a/changelog b/changelog
index 263703c..0ddadf3 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,7 @@
+20140618 tpd src/axiom-website/patches.html 20140618.01.tpd.patch
+20140618 tpd src/input/Makefile add src/input/exptest.input
+20140618 tpd src/input/exptest.input test worst case exponential values
+20140618 tpd books/bookvolbib add Lef06
20140617 tpd src/axiom-website/patches.html 20140617.01.tpd.patch
20140617 tpd books/bookvol10.1 add interval arithmetic
20140617 tpd books/bookvolbib add interval arithmetic
diff --git a/src/axiom-website/patches.html b/src/axiom-website/patches.html
index b76c633..0cf65d4 100644
--- a/src/axiom-website/patches.html
+++ b/src/axiom-website/patches.html
@@ -4476,6 +4476,8 @@ buglist wish 1011: sum(1/(k+a), k=1..n) by Gosper's method
src/input/polygamma.input add a polygamma example
20140617.01.tpd.patch
books/bookvol10.1, bookvolbib add interval arithmetic
+20140618.01.tpd.patch
+src/input/exptest.input test worst case exponential values