Integrating Human Factors in the design of Safety Critical Systems - A barrier based approach. - Bastiaan A. Schupp; Shamus P. Smith; Peter C. Wright; Louis H. J. Goossens (Human Error, Safety and Systems Development, 2004)

How Explicit Are the Barriers to Failure in Safety Arguments? - Shamus P. Smith; Michael D. Harrison; Bastiaan A. Schupp (SAFECOMP, 2004)