diff --git a/papers/fmea_software_hardware/software_fmea.tex b/papers/fmea_software_hardware/software_fmea.tex
index 4939de8..17b1084 100644
--- a/papers/fmea_software_hardware/software_fmea.tex
+++ b/papers/fmea_software_hardware/software_fmea.tex
@@ -360,7 +360,7 @@ Let us assume the {\ft} detection is via a \ohms{220} resistor, and that we read
 from an ADC into the software.
 Let us define any value outside the 4mA to 20mA range as an error condition.
 %
-As a voltage, we use ohms law~\cite{aoe} to determine the voltage ranges: $V=IR$, $0.004A * \ohms{220} = 0.88V$
+As a voltage, we use ohms law~\cite{aoe} to determine the voltage ranges: $V=IR$, $$0.004A * \ohms{220} = 0.88V $$
 and $$0.020A * \ohms{220} = 4.4V \;.$$
 %
 Our acceptable voltage range is therefore 
@@ -660,8 +660,8 @@ and these are described in~\cite{sfmeainterface}.
 %An interface FMEA is performed in table~\ref{hwswinterface}.
 %
 The hardware to software interface for the {\ft} example is handled
-by the 'C' function $read\_ADC()$.
-~\cite{sfmeaauto}.
+by the 'C' function $read\_ADC()$
+(see code sample in figure~\ref{fig:code_read_ADC}).
 %
 % An FMEA of the `software~medium' is given in table~\ref{tbl:sfmeaup}.
 \paragraph{Timing and Synchronisation.}