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\bibitem[{Dipoppa et~al.}(2001){Dipoppa, D{\textquoteright}Alessandro, Semprini \& Tronci}]{Dipoppa_etal2001} G. Dipoppa, G. D{\textquoteright}Alessandro, R. Semprini, and E. Tronci. "Integrating Automatic Verification of Safety Requirements in Railway Interlocking System Design." In \textit{High Assurance Systems Engineering, 2001. Sixth IEEE International Symposium on}, 209--219. Albuquerque, NM, USA: IEEE Computer Society, 2001. ISSN: 0-7695-1275-5. DOI: 10.1109/HASE.2001.966821.

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