diff --git a/mybib.bib b/mybib.bib
index da1b75f..73ab943 100644
--- a/mybib.bib
+++ b/mybib.bib
@@ -487,6 +487,18 @@ ISSN={2166-563X},}
   YEAR =         "1980"
 }
 
+@ARTICLE{5492693,
+author={Bishop, P. and Bloomfield, R. and Littlewood, Bev and Povyakalo, A. and Wright, D.},
+journal={Software Engineering, IEEE Transactions on},
+title={Toward a Formalism for Conservative Claims about the Dependability of Software-Based Systems},
+year={2011},
+volume={37},
+number={5},
+pages={708-717},
+keywords={probability;software fault tolerance;uncertainty handling;conservative claims;formal support;probability of failure on demand;software-based system dependability;software-based system reliability;software-based system safety;Battery powered vehicles;Phase frequency detector;Power engineering and energy;Power engineering computing;Programming;Reliability engineering;Software reliability;Software safety;Software systems;Uncertainty;Bayesian probability;safety case;software reliability.},
+doi={10.1109/TSE.2010.67},
+ISSN={0098-5589},}
+
 % $Id: mybib.bib,v 1.3 2009/11/28 20:05:52 robin Exp $
 @article{Clark200519,
 	title = "Failure Mode Modular De-Composition Using Spider Diagrams",
diff --git a/related_papers_books/SOFTWARE_REL_ASS_05492693.pdf b/related_papers_books/SOFTWARE_REL_ASS_05492693.pdf
new file mode 100644
index 0000000..8199ffa
Binary files /dev/null and b/related_papers_books/SOFTWARE_REL_ASS_05492693.pdf differ
diff --git a/submission_thesis/CH3_FMEA_criticism/copy.tex b/submission_thesis/CH3_FMEA_criticism/copy.tex
index 72291f2..638d05a 100644
--- a/submission_thesis/CH3_FMEA_criticism/copy.tex
+++ b/submission_thesis/CH3_FMEA_criticism/copy.tex
@@ -173,6 +173,9 @@ Traditional FMEA deals only with electrical and mechanical components, i.e. it d
 Modern control systems nearly always have a significant software/firmware element,
 and not being able to model software with current FMEA methodologies 
 is a cause for criticism~\cite{safeware}[Ch.12]. 
+%
+Some techniques apply conservative estimates of a given software implementation
+and use those to estimate reliability statistics~\cite{5492693}.
 %Even the traditionally conservative nuclear industry is now
 %facing up to the ubiquity of software in control systems~\cite{parnas1991assessment}.
 Similar difficulties in integrating mechanical and electronic/software