diff --git a/old_thesis/opamp_circuits_C_GARRETT/opamps.tex b/old_thesis/opamp_circuits_C_GARRETT/opamps.tex
index 41a2ad0..c48fa7a 100644
--- a/old_thesis/opamp_circuits_C_GARRETT/opamps.tex
+++ b/old_thesis/opamp_circuits_C_GARRETT/opamps.tex
@@ -50,7 +50,7 @@ These are examples of the FMMD methodology being applied to some standard electr
 \clearpage \pagenumbering{arabic}
 \section{Basic Concepts Of FMMD}
 
-The idea behind FMMD is to modularise, from the bottom-up, traditional FMEA techniques.
+The idea behind FMMD is to modularise, from the bottom-up, failure mode effects analysis.
 Traditional FMEA takes part failure modes and then determines what effect each of these
 failure modes could have on the system under investigation.
 It is worth defining clearly the term part here.
@@ -1455,7 +1455,7 @@ The reduce the complexity required to analyse this circuit we apply FMMD and sta
 We identify three types functional groups, an inverting amplifier (analysed in section~\ref{fig:invamp}),
 a 45 degree phase shifter (a {$10k\Omega$} resistor and a $10nF$ capacitor) and a non-inverting buffer
 amplifier. We can name these $INVAMP$, $PHS45$ and $NIBUFF$ respectively.
-We can use these {\fgs} to describe the circuit in block diagram form, see figure ~\ref{fig:bubbablock}.
+We can use these {\fgs} to describe the circuit in block diagram form with arrows indicating the signal path, in figure~\ref{fig:bubbablock}.
 
 \begin{figure}[h]
  \centering
@@ -1480,7 +1480,7 @@ $$ fm(INVAMP) = \{ OUT OF RANGE, ZERO OUTPUT,  NO GAIN, LOW PASS \} $$
 
 This consists of a resistor and a capacitor. We already have failure mode models for these components -- $ fm(R) = \{OPEN, SHORT\}$, $fm(C) = \{OPEN, SHORT\}$ --
 we now need to see how these failure modes would affect the phase shifter. Note that the circuit here
-is idential to the low pass filter in structure (see \ref{sec:lp}), but its intended use is different.
+is identical to the low pass filter in circuit topology (see \ref{sec:lp}), but its intended use is different.
 We have to analyse this circuit from the perspective of it being a {\em phase~shifter} not a {\em low~pass~filter}.
 
 
@@ -1508,8 +1508,8 @@ $$ fm (PHS45) = \{ 90\_phaseshift, nosignal, 0\_phaseshift \} $$
 
 \subsection{Non Inverting Buffer: NIBUFF.}
 
-The non-inverting buffer functional group, is comrised of one component, an op-amp.
-We use the failure modes for an op-amp to represent this group.
+The non-inverting buffer functional group, is comprised of one component, an op-amp.
+We use the failure modes for an op-amp~\cite[mil1991}[p. to represent this group.
 % GARK
 $$ fm(NIBUFF) = fm(OPAMP) = \{L\_{up}, L\_{dn}, Noop, L\_slew \} $$
 
diff --git a/related_papers_books/Performing FMEA Using Ontologies.pdf b/related_papers_books/Performing FMEA Using Ontologies.pdf
new file mode 100644
index 0000000..9e4d213
Binary files /dev/null and b/related_papers_books/Performing FMEA Using Ontologies.pdf differ