diff --git a/mybib.bib b/mybib.bib
index ccc5735..5a7cf32 100644
--- a/mybib.bib
+++ b/mybib.bib
@@ -1,4 +1,11 @@
 
+@BOOK{dmfnt,
+  AUTHOR =       "mixedsignaldsp",
+  TITLE =        "Mixed Signal and DSP Design Techniques ISBN 0750676116"
+  PUBLISHER =      "Newnes/Analog Devices",
+  YEAR =         "2003"
+}
+
 
 @BOOK{dmfnt,
   AUTHOR =       "R Garnier, J Taylor",
diff --git a/submission_thesis/CH5_Examples/copy.tex b/submission_thesis/CH5_Examples/copy.tex
index f071a05..3ca3d5b 100644
--- a/submission_thesis/CH5_Examples/copy.tex
+++ b/submission_thesis/CH5_Examples/copy.tex
@@ -1962,6 +1962,7 @@ The following example is used to demonstrate FMMD analysis of a mixed analogue a
 
 
 \paragraph{How the circuit works.}
+A detailed description of \sd may be found in~\cite{mixedsignaldsp}[pp.69-80].
 The diagram in~\ref{fig:sigmadeltablock} shows the signal path used
 by this configuration for a \sd.
 %